Cleaning · Top list
Best Window Cleaning Robots: Which One Leaves the Fewest Streaks?
Our verdict
Buy the Ecovacs Winbot W2S Omni ($407.55) if you have large, regularly cleaned glass and no outlet nearby. Every window robot needs you to place it pane by pane and finish corners by hand, so skip the category if your windows are small, top-opening or badly neglected.
Which one should you buy?
1Our pick
Ecovacs Winbot W2S Omni
Best for: Large panes far from outlets
$407.55 at the maker's store, seen Nov 1, 2026
Our pick: best-reviewed results and a battery station, but corners still need a wipe.
Buy it if
- You have big, flat, regularly cleaned glass.
Skip it if
- Your windows are small, top-opening or heavily soiled.
Key specs
| suction | 8,000 Pa max (claim) |
|---|---|
| runtime | 110 min ±10% from station battery (claim); reviewers measured about 60-80 min |
| edge | TruEdge scrubbers, 200 RPM, within 0.04 in of edges (claim) |
| spray | Three-nozzle, 80 ml tank |
| safety | 30-minute hold after power loss; 5.5 m cable to station (claim) |
| min_pane | 30 x 40 cm |
| size_weight | 270 x 270 x 76 mm, 1.95 kg |
Maker figures are company claims.
What owners say
Praise
- Clear glass on everyday dirt (Trusted Reviews, heise, PC-WELT)
- Held securely, edge sensors reliable
Complaints
- Corners missed or smeared
- Battery well under claim
- Must be watched and moved pane by pane
- Older W2 Omni owners report big detergent streaks
Summarized from: https://robotsrated.com/robots/ecovacs-winbot-w2s-omni/ · https://www.reddit.com/r/ecovacs/comments/1j6bhc9/winbot_w2_omni_streaks/
2Our pick
Ecovacs Winbot W2S
Best for: Windows with an outlet nearby
$399.99 at the maker's store, seen Nov 1, 2026
Same robot without the battery station; only $7.55 less on Oct 29.
Buy it if
- Every window has an outlet in reach.
Skip it if
- The Omni is nearly the same price.
Key specs
| note | Same robot as W2S Omni without the battery station (per RobotsRated); verify spec sheet before publish |
|---|
Maker figures are company claims.
3Our pick
HOBOT-2S
Best for: Lowest price, square body for corners
$299 at the maker's store, seen Nov 1, 2026Compare-at $349
Cheaper, but owner reviews are poor.
Buy it if
- You'll dry-clean first and use it on already clean glass.
Skip it if
- You want streak-free results on dirty windows.
Key specs
| weight | 1,300 g |
|---|---|
| size | 240 x 240 x 86 mm |
| spray | Dual ultrasonic, 2 x 26 ml tanks |
| suction | 6.0 kg |
| noise | 64 dB @1 m |
| min_window | 40 x 40 cm |
| power | 72 W |
| safety | 150 kgf rope; 20-min Li-Po backup battery |
Maker figures are company claims.
What owners say
{'praise': ['Works on pre-cleaned glass with a dry pass first; safer than ladders (one long review)'], 'complaints': ['1.7/5 across 12 reviews on ProductReview.com.au', 'Streaks and skid marks', 'Gets stuck or stops mid-pane', 'Spray blows away in wind', 'Refund disputes with Australian distributor (not HOBOT USA)'], 'sources': ['https://www.productreview.com.au/listings/hobot-2s-window-clean-robot']}
How do the picks compare side by side?
| Ecovacs Winbot W2S Omni | Large panes far from outlets | $407.55 | 8,000 Pa max (claim) | Three-nozzle, 80 ml tank | 30-minute hold after power loss; 5.5 m cable to station (claim) |
|---|---|---|---|---|---|
| Ecovacs Winbot W2S | Windows with an outlet nearby | $399.99 | Not listed | Not listed | Not listed |
| HOBOT-2S | Lowest price, square body for corners | $299 | 6.0 kg | Dual ultrasonic, 2 x 26 ml tanks | 150 kgf rope; 20-min Li-Po backup battery |
What do owners complain about most?
Across the 2 these picks with owner reports, these are the complaints that come up most. A good reason to check each one against how you'd use the robot.
- Mopping results1 of 2 picks (50%)
- Battery or runtime1 of 2 picks (50%)
Counted from the owner feedback summarized on each pick, which links to the owner threads. A theme counts once per pick. Not a survey.
We have not tested these robots. Everything below comes from spec sheets and owner and reviewer reports.
Is the Ecovacs Winbot W2S Omni worth it?
Yes, if you have big glass and no outlet nearby. Ecovacs claims 110 minutes per charge from the station's battery, 8,000 Pa suction, edge scrubbers that reach within 0.04 inch of the frame, and a 30-minute hold after a power cut. Its minimum pane is 30 by 40 cm.
Three hands-on reviews summarized by RobotsRated (Trusted Reviews, heise and PC-WELT) found clear glass on everyday dirt but missed or smeared corners. Two measured well under the claimed battery life, at roughly 60 to 80 minutes. Trusted Reviews said watching it and rinsing pads meant it saved no time. Owners of the older W2 Omni on r/ecovacs report big streaks from the supplied detergent.
At $7.55 less on October 29, the plain W2S only makes sense if every window has an outlet nearby.
Is the HOBOT-2S any good?
It's cheaper, but owner reviews are poor. HOBOT USA lists it at $299 with dual ultrasonic spray, a square body for corners, 6 kg suction, a 150 kgf safety rope and a 20-minute backup battery. Australian buyers on ProductReview.com.au rate it 1.7 out of 5 across 12 reviews, citing streaks, getting stuck and refund fights with a local distributor (not HOBOT USA). The one positive long review says it works on pre-cleaned glass with a dry pass first.
FAQ
Do window cleaning robots actually work? On large, regularly cleaned glass, mostly yes. Corners and baked-on dirt still need a hand.
Do window cleaning robots leave streaks? Often, especially with too much fluid or dirty pads.
Can a window robot fall off? Both brands ship a safety rope. Tie it off every time.
Can I use a window robot on outside upstairs windows? Only where you can safely reach it from inside, on a still day.
Sources
- https://www.ecovacs.com/us/shop/winbot-window-cleaning-robot/winbot-w2s-omni
- https://www.ecovacs.com/us/shop/winbot-window-cleaning-robot/winbot-w2s
- https://robotsrated.com/robots/ecovacs-winbot-w2s-omni/
- https://www.reddit.com/r/ecovacs/comments/1j6bhc9/winbot_w2_omni_streaks/
- https://hobot.us/products/hobot-2s-window-cleaning-robot-with-dual-ultrasonic-water-spray
- https://www.productreview.com.au/listings/hobot-2s-window-clean-robot