Guide
Window cleaning robots compared: which Winbot wins?
by Lorenz Keller
Does the Hutt 10’s round-square mop combination improve its cleaning performance?
1/5/2026
Translation: Katherine Martin
Pictures: Lorenz Keller
The Hutt 10 combines two mops – one square, one round. This may sound like a solution to tricky window corners, but it doesn’t quite live up to expectations.
The Hutt 10’s design is supposed to give you the best of both worlds. In theory, anyway. You see, this robot window cleaner combines two cleaning methods I’ve only ever come across in separate devices.
How this unusual system works
Hutt’s device includes two mops, both of which look different. One’s round, the other’s square. However, they don’t just differ on design – they each work in different ways too.
Round mop: A cover made of coarse microfibre goes over the mop. The mop rotates as it cleans, blitzing dirt as it goes. A fan creates suction.
Square mop: This mop’s cover is made of a finer fabric and is rectangular. It has a Velcro attachment. The robot drags the cloth over the window pane. A second fan creates suction, while a crawler propels the robot forwards.
This combination’s actually a first for the manufacturer. Hutt’s entry-level window-cleaning robot, the DDC55PRO, is kitted out with two round mops.
Meanwhile, competitor Ecovacs’ robots have a square-shaped cloth and two crawlers for cleaning window panes.
So how does the Hutt 10 clean windows? It starts by moving to the left-hand side, then makes its way to the top of the window, cleaning this stretch with the round mop. Upon reaching the top of the window, it pivots, then cleans in a straight line, again using the round mop. After that, it moves slightly further down, then cleans another straight line. At the same time, the square mop polishes the area that’s just been cleaned. In this video, you see can the way the robot moves along the window.
Water or cleaning fluid?
According to the user manual, you’re not supposed to add any cleaning fluid – the device only uses water. This is different from many of Hutt’s competitors, who include special cleaning products with their devices, which you’re then forced to buy refills for at exorbitant prices.
When I ask the manufacturer about this, it says you can also use glass cleaner as an alternative. However, it’s important you only use one part glass cleaner to ten parts water. Otherwise, the Hutt 10’s nozzles will get clogged up.
As my test reveals, adding glass cleaner doesn’t have a significant impact on cleaning quality. Mind you, it does mean the robot has a little less trouble with caked-on stains – and it leaves a fresh smell once it’s done cleaning.
What’s in the bottle that comes included with the robot? Nothing. All it’s there to do is help you fill the device with water without making a mess.
But it doesn’t even manage that. The bottle’s opening is so small that half of the water spills out when I fill it at the tap. On top of that, since the bottle isn’t see-through, mixing water and glass cleaner inside it is a struggle. You can’t tell exactly how much you’ve already poured in.
On the bright side, at least the screw-on nozzle allows you to fill the robot’s tank quickly and easily.
How good is the Hutt 10’s cleaning performance?
If you’re considering buying a window-cleaning robot, you’ll need to manage your expectations. Hoping for the kind of squeaky-clean windows you’d get by hiring a professional cleaning service? If so, the Hutt 10 isn’t for you. Expecting the robot to take some tedious chores off your hands and deliver an acceptable result? Then a product like this might be ideal for you.
The Hutt 10 certainly does that. It reliably removes pollen, fingerprints and smudges, making windows look noticeably cleaner at first glance. On closer inspection, I notice a lack of precision when it comes to details. Kind of like when I’m cleaning windows by hand and only feel half-motivated to do so.
There are a few little dirty bits along the edges. In one corner, there’s also about a square centimetre of uncleaned glass. The round mop can’t physically get to that spot. While the square mop would be ideal in this scenario, it isn’t actually used for that purpose.
I also noticed that on tough stains, such as pollen, the robot leaves a round mark on the window once it’s done cleaning that area. As a result, I have to wipe it off myself.
All in all, the Hutt 10 does just as good a job of cleaning as its competitors that use just one of the two mopping systems. Rectangular robots have the edge in corners, while the round mopping pads scrub windows more vigorously. By combining a round and a square mop, the Hutt 10 doesn’t deliver the benefits you’d expect – but it doesn’t do any worse either.
A backup battery and an insufficiently long cable
Although the robot has a small built-in battery, that only keeps it attached to the window for about 20 minutes if absolutely necessary. If you want to use the Hutt 10 continuously, you’ll need to plug it into the mains. The cable included with the robot is five metres long, which is too short for my liking. I ended up using an extension lead for most of my cleaning sessions.
If you’re using the device outdoors, you can secure it with a rope. That way, the robot won’t fall several stories if it happens to come loose by accident. The mount for the safety rope is permanently installed; even though all my windows and glass doors lead out to balconies, I didn’t have the option of removing it. As a result, the robot’s always dragging ropes and cables behind it, both of which tend to get tangled.
The Hutt 10 comes in a carry case that can be used to store the device. It contains two round and two square replacement covers. Which is good, considering how regularly they need changing. If your windows are really dirty, you’ll need to stick the covers in the washing machine after about ten square metres.
Unfortunately, putting the cover on the round mop head was often tricky, as the gap between it and the rectangular mop is very small. It takes a bit of fiddling to swap the covers between cleans. Given how often this happens, it’d be good to have a better solution in place there.
I barely used the remote control for day-to-day cleaning. Yes, you can start and stop the robot, steer it manually or clean a specific area more thoroughly at the touch of a button. But you can also use the Hutt 10 without it.
Commendably quiet, fairly slow
The Hutt 10 doesn’t make much noise while it’s cleaning. At 74 decibels (dB), it’s the quietest window-cleaning robot I’ve ever tested. So, about as noisy as a vacuum cleaner. If you’re in the same room as the robot, it’ll disturb you. However, it’s fine with a little distance.
The window-cleaning robot moves over the glass at a fairly relaxed pace – an impression I confirmed by measuring the device’s speed. It takes about 11 minutes and 30 seconds to clean a «standard» window. That’s slower than robot window cleaners with a square mop and crawler, but faster than Hutt’s model fitted with two round mops.
Glass roofs, gaps and tough scenarios
Window cleaning robots tend to be designed for standard framed windows. Hutt says its devices can effectively clean slightly inclined surfaces up to an angle of approximately 20 degrees. However, the manufacturer also points out that they perform «poorly/unreliably» on flat glass roofs.
So how does the Hutt 10 fare in practice?
Obstacles: My test device had to navigate two obstacles: a cat flap on one side and a hinge on the other. The Hutt 10 deftly avoided both, but left a five-centimetre-wide strip right above the cat flap uncleaned.
Uneven surfaces: The robot simply rolls right over stuck-on window decals. Sometimes it turns up the fan a little higher, but the stickers don’t present a real obstacle.
Frameless glass: On frameless panes, the robot moves slightly over the edge, detects this and corrects itself. It has no problem cleaning frameless glass doors.
Tiles: The robot can also attach itself to other surfaces. Mirrors aren’t an issue for the device – and it doesn’t even struggle with bathroom tiles. When it cleaned my bathroom wall, it just ran right over the grout.
Gaps: If the glass in a window isn’t continuous, the robot has a problem. My bathroom mirror’s divided into two sections, with a three-millimetre gap between them. The partition halts the Hutt 10 in its tracks, causing it to stop cleaning. The only way around this is to pull the panes apart so that the device cleans each area separately. However, you do then have to move the robot between them yourself.
Glass roofs: Since I don’t have a conservatory – or a glass table, for that matter – I laid a large mirror flat across two chairs. The Hutt 10 fails completely in this scenario, not even managing to adhere to the glass. It just doesn’t work horizontally.
The Hutt 10 is designed for standard windows, so it has no trouble with frameless glass and other smooth surfaces. However, small gaps between panes or horizontal surfaces like glass roofs, are too much for it to handle. To sum up, the device does everything the manufacturer promises, but nothing more.
In a nutshell
Does the job, but it’s nothing to shout about
The Hutt 10 wipes and polishes windows to an acceptable standard, performing as well as any window-cleaning robot on the market right now. Thanks to its combination of one round and one square mop, it cleans large windowpanes exceptionally well, but does a mediocre job with corners. Overall, the two-in-one cleaning system isn’t noticeably better than the systems in competing devices produced by Hutt or other manufacturers.
The device is straightforward to use in day-to-day life and doesn’t make much noise. It is, however, fairly slow. Priced at around 280 francs, the Hutt 10 is one of the manufacturer’s pricier models. By contrast, the DDC55PRO costs 100 francs less, but isn’t far off the Hutt 10 in terms of performance.
Pro
- Runs quietly
- Cleaning performance on a par with other devices on the market
- Small and compact
- Works without expensive cleaning fluid
Contra
- Doesn’t clean glass roofs
- Doesn’t clean corners properly
- Slow
Lorenz Keller
Senior Editor
Lorenz.Keller@digitecgalaxus.chGadgets are my passion - whether you need them for the home office, for the household, for sport and pleasure or for the smart home. Or, of course, for the big hobby next to the family, namely fishing.
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