iGLASSBOT W300
Limited evidenceRead the findings →Mamibot's flagship window robot, which sprays, wipes and squeegees the glass in one pass. It suits big upright panes near a socket. It needs panes at least 60cm square, which rules out small or divided windows.
See the alternatives below, or switch market.
Where it sits in Mamibot’s range
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What we know
Everything here comes from Mamibot's product page and its Mamibot overview, which points anyone who wants spraying, wiping and squeegeeing in one go towards the W300. The squeegee is the headline claim: Mamibot says it leaves no water marks. It also has a far bigger tank than Mamibot's other models, sensors on all four sides and several cleaning modes, but still runs from the mains.
A squeegee behind the cloth
Mamibot says the W300 sprays the glass, wipes it with a wet microfibre pad and then draws a flexible squeegee across it in the same pass, an idea borrowed from car windscreen cleaning. The point is to pull off the excess water that leaves streaks on cloth-only robots. It's the W300's main selling point, and the one feature that sets it apart from the rest of Mamibot's range.
Corners and edges
Mamibot describes a four-sided edge-cleaning design meant to reach awkward corners, physical sensors on all four sides to spot where the glass ends, and an Edge mode. It also lists Fast, Deep, Spot and Manual modes, plus route planning to cut down on missed patches. Mamibot doesn't say outright that it handles frameless glass.
Big tank, mains power
The 215ml tank is far larger than the 50 to 80ml on Mamibot's other models, and Mamibot says it covers about 35 square metres per fill. It still runs from the mains, through a combined power cable and safety rope. If the power goes, a backup battery holds it on for 25 to 30 minutes, with a low-battery alarm. You'll still need a socket near every window.
Check your panes first
Mamibot gives a minimum pane size of 60 by 60cm and a minimum glass thickness of 3mm, which rules out small or divided panes. The body is 27cm across and 6.9cm tall. Mamibot also lists tiles, marble walls and smooth wooden doors as suitable surfaces, and firmware updates arrive through the app. Measure your smallest window before you buy.
What's not checked yet
Nobody has tested the W300 or posted an owner review, so the big questions are open. How dry and streak-free the squeegee really leaves the glass, which is Mamibot's headline claim. How well the four-sided edge design reaches corners. How steadily it grips on a large pane. And how long the squeegee rubber lasts before it needs replacing.
Our take
Should you buy the iGLASSBOT W300?
Best for: Large windows cleaned regularly, with a socket nearby. Skip it if: You want a stronger record in independent tests before buying.
Wait for a review. If the squeegee works as promised, it could suit big upright panes near a socket better than Mamibot's cloth-only models. Until someone tests it, the Ecovacs WINBOT W2S OMNI is a safer bet for large glass, with three positive home tests and a battery station, and HOBOT's S7 Pro has two long tests behind it for big or frameless panes.
The W300 sits at the top of Mamibot's iGLASSBOT range. Where the cheaper models wipe with cloth pads alone, it drags a rubber squeegee behind the wet cloth, the way a window cleaner finishes a pane, and Mamibot says that leaves no water marks. It sprays from four nozzles, holds 215ml of water (enough for about 35 square metres, Mamibot says), quotes far stronger suction than Mamibot's other models, and has sensors on all four sides to find the edges. You pick fast, deep, edge, spot or manual modes in the app.
The trade-off is the set-up. It runs from the mains through a combined power cable and safety rope, so you'll want a socket near every window, and it needs panes at least 60cm square, which rules out small or divided ones.
Before you buy
The questions people ask about this one
Does it leave streaks or edges?
Mamibot says the squeegee leaves no water marks and the four-sided design reaches corners, per the specifications. Neither claim has been tested. Cloth-only robots often leave faint streaks, and the squeegee is Mamibot's answer to that.
What happens if the power cuts out?
the specifications lists a backup battery that holds it on the glass for 25 to 30 minutes, a low-battery alarm and a safety rope built into the power cable. It won't carry on cleaning on battery, and nobody has tested the backup independently.
Will it fit my windows?
Only if the panes are at least 60 by 60cm and the glass is at least 3mm thick, according to the specifications. The robot is 27cm across. Mamibot adds that Mamibot's robots suit smooth upright surfaces, not rough or textured ones.
Does it work on frameless glass?
Mamibot doesn't say directly. the specifications describes physical edge sensors on all four sides to recognise where the glass ends, which is what frameless glass needs, but it stops short of promising frameless support. Until someone tests it, stick to framed windows.
Is it loud?
the specifications quotes operating noise of up to 70dB and calls it comfortable for home use. That's the maker's own figure; nobody has measured it independently or compared it with other window robots.
Alternatives
Other window-cleaning robots to compare.
WINBOT W2S OMNI
Why consider it: Its battery station means no socket by the window, and three recent tests found it cleans everyday dirt well and gets closer to the edges than most.
The compromise: It won't fit small or top-opening panes, and corners and neglected glass still need a hand.
S7 Pro
Why consider it: Built for big panes and frameless glass, and TechRadar found it excellent on lightly dirty glass.
The compromise: Both tests found streaks on dirtier glass, and it saves effort rather than time.
WINBOT MINI
Why consider it: Two German home tests found it left small and medium panes mostly streak-free after one pass.
The compromise: It's for smaller panes, and one tester saw dirt left in the last millimetres at the frame.
Specs
Full specifications
Each specification names its source. Manufacturer claims are not independent test results; unconfirmed figures are labelled.
Owner reviews
Do you own the iGLASSBOT W300?
Tell people how it’s held up: cleaning, maintenance, faults and support. Owner accounts are shown separately from independent reviews.
Sources
Where this page’s findings come from
Sources
- Mamibot: iGLASSBOT W300 product page ↗Manufacturer
- Mamibot: Mamibot robot window cleaner range and FAQ ↗Manufacturer
Videos
- Release year: New Window Cleaning Robot 2026 | Mamibot W300 Premium Window Robot ↗News
- Search YouTube for Mamibot iGLASSBOT W300 ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.