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WORX WX770.9 SteamStorm Review | 48 Data compared

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  • Avg. price in UK: ~£90
  • Avg. price in US: ~$110
  • Steam pressure: ?
  • Water tank capacity: 120 ml
  • Heat-up time: 8 seconds
  • Power rating: 260 W
  • Weight: 0.59 kg

WORX WX770.9 SteamStorm review. Compare 48 technical specifications and user reviews to see how this product ranks in the Portable Steam Cleaners category and whether it is worth buying.

6.5

Overall score

What it is: An overall evaluation of products in the Portable Steam Cleaners category, based on technical analysis and user reviews.

When it matters: When you need a quick reference for identifying the best products in the Portable Steam Cleaners category.

Score components:

80.0%

6.8

Technical Score

20.0%

5.4

User score

Good
6.8

Technical Score

What it is: An assessment of technical performance for products in the Portable Steam Cleaners category across these key areas: Performance, Tank, Accessories, Portability, Safety.

When it matters: When you want to compare products in the Portable Steam Cleaners category by technical performance, specifications, and available features.

Score components:

65.0%

7.2

Performance

15.0%

4.9

Tank

10.0%

6.7

Accessories

6.0%

8.3

Portability

4.0%

4.6

Safety

Good
5.4

User score

What it is: A rating that combines user reviews with the total review volume for products in the Portable Steam Cleaners category.

When it matters: When you want to know how products in the Portable Steam Cleaners category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

5.9

User reviews

30.0%

4.3

Popularity

User score:
United Kingdom
amazon
3.2
(56)
amazon
2.5
(28)
amazon
2.8
(10)
amazon
3.0
(2)

(Reviews last updated: August 2026)

Good
  • 5.2
    Deep cleaning

    Score components:

    35.0%

    ?

    Steam pressure

    25.0%

    2.3

    Steam temperature

    20.0%

    1.0

    Power rating

    20.0%

    ?

    Continuous steam time

  • 6.4
    Versatile cleaning

    Score components:

    30.0%

    ?

    Accessory count

    20.0%

    4.0

    Extension hose included

    20.0%

    10

    Upholstery / fabric tool

    15.0%

    4.0

    Window squeegee

    15.0%

    4.0

    Floor-cleaning kit included

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Best prices in UK

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The WORX WX770.9 SteamStorm is a 20V cordless handheld steam cleaner that delivers 260 watts of power and generates chemical-free steam at 220°F (105°C) to eliminate 99.9% of germs. Main characteristics include an ultra-fast 8-second preheat time, a lightweight bare-tool design weighing just 1.3 lbs (2.8 lbs with a 4.0Ah battery), and a 4.1 fl. oz. (120 ml) water tank that does not require depressurizing to refill. Key advantages include its extreme portability, safe continuous one-touch operation without a held trigger, compatibility with the Worx PowerShare battery platform, and an included 5-piece multi-surface accessory kit. However, notable drawbacks include a relatively short runtime of approximately 8 minutes with a 2.0Ah battery or 16 minutes with a 4.0Ah battery, a small water tank capacity that demands frequent refills during large tasks, and the fact that the .9 designation indicates it is sold as a bare tool without a battery or charger included.

Technical Specifications of portable steam cleaner WORX WX770.9 SteamStorm

Technical Score

What it is: An assessment of technical performance for products in the Portable Steam Cleaners category across these key areas: Performance, Tank, Accessories, Portability, Safety.

When it matters: When you want to compare products in the Portable Steam Cleaners category by technical performance, specifications, and available features.

Score components:

65.0%

7.2

Performance

15.0%

4.9

Tank

10.0%

6.7

Accessories

6.0%

8.3

Portability

4.0%

4.6

Safety

6.8
WORX WX770.9 SteamStorm has a technical score of 6.77 points, which is higher than 68% of products in this category.
User score

What it is: A rating that combines user reviews with the total review volume for products in the Portable Steam Cleaners category.

When it matters: When you want to know how products in the Portable Steam Cleaners category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

5.9

User reviews

30.0%

4.3

Popularity

User score:
United Kingdom
amazon
3.2
(56)
amazon
2.5
(28)
amazon
2.8
(10)
amazon
3.0
(2)

(Reviews last updated: August 2026)

5.4
WORX WX770.9 SteamStorm has a user score of 5.42 points, which is lower than 94.9% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by products in the Portable Steam Cleaners category.
When it matters: When you prefer products in the Portable Steam Cleaners category that have been chosen and reviewed by many other buyers.
4.3
WORX WX770.9 SteamStorm has a popularity of 4.3 points, which is lower than 52.6% of products in this category.
Ratio quality/price

What it is: An indicator that combines the overall score of products in the Portable Steam Cleaners category with their prices.

When it matters: When you are comparing products in the Portable Steam Cleaners category and want a good balance between quality and price.

Score components:

60.0%

6.5

Overall score

40.0%

6.5

Price

6.5
WORX WX770.9 SteamStorm has a quality-to-price ratio of 6.5 points, which is lower than 83.3% of products in this category.
Steam pressure
What it is: Shows the steam pressure of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: HIGH

Good value: At least 3 bar

?
Steam temperature
What it is: Shows the steam temperature of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: HIGH

Good value: At least 100 °C

105 °C
WORX WX770.9 SteamStorm has a steam temperature of 105 °C, which is lower than that of 56.5% of portable steam cleaners and matches that of 22.6% of portable steam cleaners.
Heat-up time
What it is: Shows the heat-up time of the portable steam cleaner.
When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

Importance: HIGH

Good value: Up to 180 seconds

8 seconds
WORX WX770.9 SteamStorm has a heat-up time of 8 seconds, which is shorter than that of 100% of portable steam cleaners.
Continuous steam time
What it is: Shows the continuous steam time of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: HIGH

Good value: At least 8 minutes

?
Steam flow rate
What it is: Shows the steam flow rate of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: HIGH

Good value: At least 25 g/min

?
Show more
Power rating
What it is: Shows the power rating of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: MEDIUM

Good value: At least 1000 W

260 W
WORX WX770.9 SteamStorm has a power rating of 260 W, which is lower than that of 100% of portable steam cleaners.
Water tank capacity
What it is: Shows the water tank capacity of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: MEDIUM

Good value: At least 250 ml

120 ml
WORX WX770.9 SteamStorm has a water tank capacity of 120 ml, which is smaller than that of 96.1% of portable steam cleaners and matches that of 1.3% of portable steam cleaners.
Boiler capacity
What it is: Shows the boiler capacity of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: LOW

Good value: At least 250 ml

120 ml
WORX WX770.9 SteamStorm has a boiler capacity of 120 ml, which is smaller than that of 100% of portable steam cleaners.
Water fill method
What it is: Shows how the portable steam cleaner is refilled with water.
When it matters: It matters if you prefer a simpler or more convenient way to refill the tank.

Importance: LOW

removable water tank
Power cord length
What it is: Shows the power cord length of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: MEDIUM

Good value: At least 3 m

?
Show more
Accessory count
What it is: Shows the accessory count of the portable steam cleaner.
When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

Importance: LOW

Good value: At least 8 accessories

?
Extension hose included
What it is: Shows whether the portable steam cleaner comes with extension hose.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not include extension hose.
Concentrator / jet nozzle
What it is: Shows whether the portable steam cleaner has jet nozzle.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

yes
WORX WX770.9 SteamStorm includes jet nozzle.
Detail brushes included
What it is: Shows whether the portable steam cleaner comes with detail brushes.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

yes
WORX WX770.9 SteamStorm includes detail brushes.
Brass brush included
What it is: Shows whether the portable steam cleaner comes with brass brush.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not include brass brush.
Show more
Weight
What it is: Shows the weight of the portable steam cleaner.
When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

Importance: LOW

Good value: Up to 2 kg

0.59 kg
WORX WX770.9 SteamStorm weighs 0.59 kg, which is lighter than that of 98.6% of portable steam cleaners.
The 1.3 lb bare-tool weight converts to about 0.59 kg.
Width
What it is: Shows the width of the portable steam cleaner.
When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

Importance: LOW

Good value: Up to 300 mm

76 mm
WORX WX770.9 SteamStorm is 76 mm wide, which is narrower than that of 100% of portable steam cleaners.
Height
What it is: Shows the height of the portable steam cleaner.
When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

Importance: LOW

Good value: Up to 250 mm

?
Depth
What it is: Shows the depth of the portable steam cleaner.
When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

Importance: LOW

Good value: Up to 180 mm

?
Carry handle
What it is: Shows whether the portable steam cleaner has carry handle.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

yes
WORX WX770.9 SteamStorm has carry handle.
Show more
Child safety lock
What it is: Shows whether the portable steam cleaner has child safety lock.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not have child safety lock.
Safety valve / safety cap
What it is: Shows whether the portable steam cleaner has safety valve / cap.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not have safety valve / cap.
The removable or open water tank does not use a pressurized safety cap.
Trigger lock / continuous steam lock
What it is: Shows whether the portable steam cleaner has trigger lock for continuous steam.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not have trigger lock for continuous steam.
Auto shut-off
What it is: Shows whether the portable steam cleaner has auto shut-off.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not have auto shut-off.
Descaling system
What it is: Shows whether the portable steam cleaner has descaling system.
When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

Importance: LOW

no
WORX WX770.9 SteamStorm does not have descaling system.
Show more

WORX WX770.9 SteamStorm vs the average portable steam cleaner

  • 172 seconds faster heat-up
    WORX WX770.9 SteamStorm offers faster heat-up than the average portable steam cleaner (8 seconds vs 180 seconds).
    What it is: Shows the heat-up time of the portable steam cleaner.
    When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

    Importance: HIGH

    Good value: Up to 180 seconds

    WORX WX770.9 SteamStorm offers faster heat-up than the average portable steam cleaner (8 seconds vs 180 seconds).8 seconds vs 180 seconds
  • Continuous refill system
    WORX WX770.9 SteamStorm has continuous refill system, the average portable steam cleaner does not.
    What it is: Shows whether the portable steam cleaner has continuous refill system.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: LOW

    WORX WX770.9 SteamStorm has continuous refill system, the average portable steam cleaner does not.
  • 1.09 kg lighter weight
    WORX WX770.9 SteamStorm offers lighter weight than the average portable steam cleaner (0.6 kg vs 1.68 kg).
    The 1.3 lb bare-tool weight converts to about 0.59 kg.
    What it is: Shows the weight of the portable steam cleaner.
    When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

    Importance: LOW

    Good value: Up to 2 kg

    WORX WX770.9 SteamStorm offers lighter weight than the average portable steam cleaner (0.6 kg vs 1.68 kg).0.59 kg vs 1.68 kg
  • Detachable water tank
    WORX WX770.9 SteamStorm has detachable water tank, the average portable steam cleaner does not.
    What it is: Shows whether the portable steam cleaner has detachable water tank.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: LOW

    WORX WX770.9 SteamStorm has detachable water tank, the average portable steam cleaner does not.
  • Scraper tool included
    WORX WX770.9 SteamStorm includes scraper tool, the average portable steam cleaner does not.
    What it is: Shows whether the portable steam cleaner has scraper tool.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: LOW

    WORX WX770.9 SteamStorm includes scraper tool, the average portable steam cleaner does not.
  • 69 mm narrower body
    WORX WX770.9 SteamStorm offers narrower body than the average portable steam cleaner (76 mm vs 145 mm).
    What it is: Shows the width of the portable steam cleaner.
    When it matters: It matters if you want quicker handling, a faster start, or a more compact design.

    Importance: LOW

    Good value: Up to 300 mm

    WORX WX770.9 SteamStorm offers narrower body than the average portable steam cleaner (76 mm vs 145 mm).76 mm vs 145 mm
  • 172 seconds faster heat-up
    WORX WX770.9 SteamStorm offers faster heat-up than the average portable steam cleaner (8 seconds vs 180 seconds).
  • Continuous refill system
    WORX WX770.9 SteamStorm has continuous refill system, the average portable steam cleaner does not.
  • Detachable water tank
    WORX WX770.9 SteamStorm has detachable water tank, the average portable steam cleaner does not.
  • Scraper tool included
    WORX WX770.9 SteamStorm includes scraper tool, the average portable steam cleaner does not.
  • 1.09 kg lighter weight
    WORX WX770.9 SteamStorm offers lighter weight than the average portable steam cleaner (0.6 kg vs 1.68 kg).
  • 69 mm narrower body
    WORX WX770.9 SteamStorm offers narrower body than the average portable steam cleaner (76 mm vs 145 mm).

Total
Performance
Tank
Accessories
Portability
  • No on-demand steam trigger
    WORX WX770.9 SteamStorm does not have on-demand steam trigger, the average portable steam cleaner does.
  • 5 °C cooler steam
    WORX WX770.9 SteamStorm offers cooler steam than the average portable steam cleaner (105 °C vs 110 °C).
  • 230 ml smaller water tank
    WORX WX770.9 SteamStorm offers smaller water tank than the average portable steam cleaner (120 ml vs 350 ml).
  • 790 W less power
    WORX WX770.9 SteamStorm offers less power than the average portable steam cleaner (260 W vs 1050 W).
  • 230 ml smaller boiler capacity
    WORX WX770.9 SteamStorm offers smaller boiler capacity than the average portable steam cleaner (120 ml vs 350 ml).
  • No window squeegee
    WORX WX770.9 SteamStorm does not include window squeegee, the average portable steam cleaner does.
  • No extension hose
    WORX WX770.9 SteamStorm does not include extension hose, the average portable steam cleaner does.
  • 1 fewer small-brush cloths
    WORX WX770.9 SteamStorm offers fewer small-brush cloths than the average portable steam cleaner (0 vs 1).
  • No funnel
    WORX WX770.9 SteamStorm does not include funnel, the average portable steam cleaner does.
  • No measuring cup
    WORX WX770.9 SteamStorm does not include measuring cup, the average portable steam cleaner does.
  • No auto shut-off
    WORX WX770.9 SteamStorm does not have auto shut-off, the average portable steam cleaner does.
  • No safety valve / cap
    WORX WX770.9 SteamStorm does not have safety valve / cap, the average portable steam cleaner does.
    The removable or open water tank does not use a pressurized safety cap.
  • No child safety lock
    WORX WX770.9 SteamStorm does not have child safety lock, the average portable steam cleaner does.
  • 230 ml smaller water tank
    WORX WX770.9 SteamStorm offers smaller water tank than the average portable steam cleaner (120 ml vs 350 ml).
    What it is: Shows the water tank capacity of the portable steam cleaner.
    When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

    Importance: MEDIUM

    Good value: At least 250 ml

    WORX WX770.9 SteamStorm offers smaller water tank than the average portable steam cleaner (120 ml vs 350 ml).120 ml vs 350 ml
  • No on-demand steam trigger
    WORX WX770.9 SteamStorm does not have on-demand steam trigger, the average portable steam cleaner does.
    What it is: Shows whether the portable steam cleaner has on-demand steam trigger.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: HIGH

    WORX WX770.9 SteamStorm does not have on-demand steam trigger, the average portable steam cleaner does.
  • 5 °C cooler steam
    WORX WX770.9 SteamStorm offers cooler steam than the average portable steam cleaner (105 °C vs 110 °C).
    What it is: Shows the steam temperature of the portable steam cleaner.
    When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

    Importance: HIGH

    Good value: At least 100 °C

    WORX WX770.9 SteamStorm offers cooler steam than the average portable steam cleaner (105 °C vs 110 °C).105 °C vs 110 °C
  • 790 W less power
    WORX WX770.9 SteamStorm offers less power than the average portable steam cleaner (260 W vs 1050 W).
    What it is: Shows the power rating of the portable steam cleaner.
    When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

    Importance: MEDIUM

    Good value: At least 1000 W

    WORX WX770.9 SteamStorm offers less power than the average portable steam cleaner (260 W vs 1050 W).260 W vs 1050 W
  • 230 ml smaller boiler capacity
    WORX WX770.9 SteamStorm offers smaller boiler capacity than the average portable steam cleaner (120 ml vs 350 ml).
    What it is: Shows the boiler capacity of the portable steam cleaner.
    When it matters: It matters if you want stronger performance, better reach, or more flexibility in use.

    Importance: LOW

    Good value: At least 250 ml

    WORX WX770.9 SteamStorm offers smaller boiler capacity than the average portable steam cleaner (120 ml vs 350 ml).120 ml vs 350 ml
  • No auto shut-off
    WORX WX770.9 SteamStorm does not have auto shut-off, the average portable steam cleaner does.
    What it is: Shows whether the portable steam cleaner has auto shut-off.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: LOW

    WORX WX770.9 SteamStorm does not have auto shut-off, the average portable steam cleaner does.
  • No window squeegee
    WORX WX770.9 SteamStorm does not include window squeegee, the average portable steam cleaner does.
    What it is: Shows whether the portable steam cleaner has window squeegee.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: LOW

    WORX WX770.9 SteamStorm does not include window squeegee, the average portable steam cleaner does.
  • No extension hose
    WORX WX770.9 SteamStorm does not include extension hose, the average portable steam cleaner does.
    What it is: Shows whether the portable steam cleaner comes with extension hose.
    When it matters: It matters if this feature changes convenience, versatility, safety, or ease of use.

    Importance: LOW

    WORX WX770.9 SteamStorm does not include extension hose, the average portable steam cleaner does.
Total
Overall
Performance
Tank
Accessories
Safety

Graphic comparison of WORX WX770.9 SteamStorm and other products in the Portable Steam Cleaners category

Attribute category
Attribute
No results found

Third-party reviews

United Kingdom
amazon
3.2
56 Reviews
amazon
2.5
28 Reviews
amazon
2.8
10 Reviews
amazon
3.0
2 Reviews

(Reviews last updated: August 2026)

What customers like about WORX WX770.9 SteamStorm?

  • Completely cordless, allowing for easy mobility around the house, car, or outdoors without being tethered to an outlet
  • Rapid heating element allows the steamer to preheat to $220^\circ\text{F}$ in just 8 seconds
  • Lightweight (approx. 2.8 lbs with battery) and highly compact, making it great for reaching tight spaces and corners
  • Safe and easy to refill without needing to depressurize the water tank first, which reduces the risk of burns

What customers dislike about WORX WX770.9 SteamStorm?

  • Battery life drains quickly when used continuously, which limits prolonged cleaning sessions
  • Some users reported that the handle of the unit gets excessively hot during operation, occasionally requiring oven mitts or pot holders for safe use
  • Small water tank capacity necessitates frequent refilling during larger cleaning jobs
  • Does not produce the continuous high-pressure steam associated with larger, corded canister steam cleaners

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