• The Aqua20 Pro Ultra Roller X Complete is Dreame's new flagship robovac
• World's first robovac to use heated steam at 180°C as part of its mop system
• Can also clear double-step thresholds up to an impressive 3.9in / 10cm

When I spoke to a load of major robot vacuum brand execs about where they thought robovacs were heading in the next five-to-10 years, a common theme cropped up: the desire to close the performance gap between manual and robotic floor cleaners. That's not just the vacuuming power, but the mopping prowess too.

And so, at IFA 2026, we have the world's first robot vacuum with steam cleaning powers: the Dreame Aqua20 Pro Ultra Roller X Complete. It's an exciting prospect, but based on the demo I saw, I'm not sure I'd be throwing out my manual steam cleaner any time soon.

The Aqua20 Pro Ultra (I'm not typing the full name each time) vaporizes water into 356°F / 180°C steam, which is pushed out through four outlets along the roller edge. This steam is designed to loosen tough, dried-on stains. The roller then gently scrubs them away, using hot water.

On the demo I saw, the steam function seemed quite gentle — there wasn't enough to be visible on a still photo, although you can see it in the video clip above. My first concern about the system is that there might not be enough steam to really make an impact.

The second is that because the heating happens inside the bot itself, using it has a big impact on battery life. I spoke to Dawn Chen, a Director at Dreame, and he confirmed that with the steam function on, the robot's runtime is around 30 to 40 minutes, compared to around four hours with it off. Steam needs to be switched on and off manually, in the app, and can only be used for a zone that's less than 10 square meters in size. Chen explained that the function is meant for spot-cleaning only; to tackle stubborn and dried on stains.

That runtime is fairly limiting. It makes it difficult to use the steam function as part of a more extensive cleaning session, which is a situation I expect will be common.

Making it work

The process of adding the steam function caused Dreame a few headaches. "During this R&D process, we faced two main problems. The first is about the limescale. Because we are turning the water into steam, this process will produce a lot of limescale," Chen explained. "To solve this problem, we added some limescale remover inside the robot, in the pipeline."

The second — and perhaps bigger — challenge was to do with controlling the temperature inside robot itself. "Because we put this kind of heat inside the robot body, the heat it produces will affect other components, especially the electronic components inside the robot body," Chen told me.

To address the issue, the engineers had to add internal insulation to protect the different components. And that was easier said than done — Dreame had to completely redesign the inside of the robovac to add the steam components, and insulation, while still maintaining the streamlined shape and size.

All the talk of limescale and preventing damage to internal components instills a certain amount of fear in me. I can't help but wonder if iRobot might have had the better approach — that brand's new Roomba Max 875 expels warm mist rather than steam, and the active heating happens in-dock rather than on-bot.

The demo showed a much denser cloud of mist than Dreame's bot was expelling, and because the Rooma bot itself isn't doing any active heating, using the mist function has a minimal impact on battery life. Of course, the really important thing is how effectively each robot cleans, and we won't know that until we've had a chance to test them.

Other upgrades

Back to the Aqua20 Pro. Aside from the headline steam feature, you'll also find an upgraded 'Proleap' system that can now bump the bot over single steps up to 2in / 5cm, or double steps up to 3.9in / 10cm. That's the tallest threshold clearance I've seen from any brand (so far) although in the demo it sometimes took a couple of run-ups to make it over.

Dreame has also added enhanced AI vision with adaptive learning — so the robovac can apparently react to moving objects and re-plan its route, in real time, in response.

The roller can kick out from the side of the robovac by up to 8cm / 3in — much further than its predecessor, the Aqua10 Ultra Roller Complete — to get nice and close to the edges of rooms. To avoid unwanted dampness while all this is going on, the main vacuum roller and side sweeper can both lift (by 5mm and 10mm respectively) while the mopping is happening. The roller can also lift 15mm when the bot is traversing carpet.

The Dreame Aqua20 Pro Ultra Roller X Complete is due to launch on September 21 in Germany, Austria, Spain, Portugal, and Switzerland, followed by a number of other European countries. I don't have a launch date for the UK yet, but Chen promises it'll arrive before the end of the year. Due to FCC regulations, launch in the US is unconfirmed.

• iRobot has unveiled its new flagship Roomba Max 875 Combo
• It sprays out heated mist to dislodge dried dirt from hard floors
• There's a seal around the vacuum to maximize pickup power

iRobot has revealed its latest flagship robot vacuum, and I've just seen it in action at IFA 2026. The Roomba Max 875 Combo is a combination robovac-and-mop, and boasts some intriguing features on both of those floorcare prongs.

One that caught my attention in particular is the mopping setup. Robot vacuum mopping has historically been rather underwhelming, but the latest models are showing some significant improvements. iRobot's Roomba Max 875 Combo's USP is its 'ThermaMist' function. I got the low-down from Adam Pope, Chief Engineer & Vice President of Product Planning & Development at iRobot.

"The ThermaMist is a pretty interesting technology," he tells me. "It's an ultrasonic warm mist, meant to pre-treat stains. So it'll detect stains and pre-treat them before it mops. The customer can also activate it in a certain area if they want to just do that whole area.

"The heat gives you a little better power to break up some of the oily or sugary stains that might be sticky. So that's the reason that we have the heat in there, really, try to help break those up."

Unlike on Dreame's new mist-expelling robovac, which heats the water on the robot itself, here the heating happens in the dock. From an engineering perspective, what's interesting is that the on-bot process of creating ultrasonic mist also naturally generates warmth.

"The dock can put hot water in the robot, but the actual ultrasonic ThermaMist part of that process, it does actually heat the water as it's coming out," explains Pope. "When [the water] goes through that process, it comes out warm, even if there's room temperature water in the robot."

The fact there's no active heater on the robot itself is good news for battery life. "With the ThermaMist on, it's going to have a small impact on the battery life, but not a large one, because the process of heating is part of the ultrasonic component," Pope confirms. "It's not like there's a special heater that you're running all the time."

Unfortunately, iRobot wasn't demoing the ThermaMist feature when I visited the booth. However, based on the video (above) I was sent over later, it looks promising — there's a good amount of mist created, and it's being delivered evenly. In theory it sounds like a truly interesting innovation, and one that has plenty of potential to deliver strong mopping results.

iRobot has also extended the mop, which is larger in diameter and spins faster than its predecessors, for extra scrubbing power. It can kick out to one side to get close to the edges of rooms, and there's a shield that will slide under the roller as extra protection against unwanted sogginess when the bot is moving over carpet.

Sealing the deal

There's interesting innovation on the vacuuming front too. iRobot has added a 'SealForce' system, which is essentially a kind of skirt around the suction inlet on the Max 875 Combo, which lowers to form a loose seal against the carpet fibers.

"The SealForce brings a component of the cleaning head down to the floor, so you get all that airflow going right through the deep fibers of the carpet, trying to pull everything deeply out of the carpet, or even out of crevices, grout lines, that sort of thing," says Pope. "It's really kind of applying the suction where you need it most."

In the demo, the 'SealForce' seal wasn't as dramatic as I had been expecting. You can see the moving frame around the suction inlet below, and in the right-hand photo it's about as extended as it gets. That small shift could be enough to make a big difference to the suction, through — we'll need to test it out to find out.

iRobot is traditionally shy about publishing its suction specs, but here it has done: the Roomba Max 875 Combo offers 35,000Pa, which is right up there with the highest numbers you'll find anywhere. I'm increasingly of the opinion that it doesn't really matter anyway. The suction is only as effective as the wider design you put it into — and if it works as intended, this seal could make a big difference to the Max 875's pickup power.

Saving grace

The past few years have been a rocky time for once-supreme robot vacuum brand iRobot. Its bots have fallen behind the pack when it comes to features, so it's exciting to see the company starting to find its footing again when it comes to innovation.

The iRobot Roomba Max 875 Combo is on sale now in the UK, priced at £1,099. (equivalent to about $1,490 / AU$2,060). iRobot has a presence in Australia, but I don't yet have launch details for the 875 Combo there.

What about the US? Due to the new FCC ban on foreign-made "advanced" robots, the Max 875's launch is on pause for now. iRobot was founded in the US, but at the start of the year it was taken over by Chinese manufacturing company Picea. However, this takeover isn't to blame for the fact the brand can't now sell its new products in the US; the ban refers to where the product is manufactured, and Roomba bots have long been made outside of the US.

In terms of future plans, Pope has this to say: "We're working through with our advisors on how we continue to sell in the US. So we have multiple plans that we're working through and multiple strategies that will come to fruition, and we'll still be able to bring cool technology to the US as well."

During my years as a TechRadar Homes Editor, I tested an awful lot of vacuums. But the one that's been my constant companion throughout has been the Dyson V15 Detect. It's not a review sample — my partner bought it, and it's the vacuum we've been using at home for the past 21-plus months. It's been used to clean hard tile floors, carpets, lots of stairs, and a whole heap of dog hair.

The V15 is not the newest Dyson vacuum. It came out in 2021 and there are now two newer flagship models: the Gen5detect (launched 2022) and the V16 Piston Animal (2025). However, despite not being the latest-and-greatest, it's still the model that sits atop our best Dyson vacuum guide.

So after nearly two years of regular cleaning with the V15, would I still recommend it? How does it match up against the rest of the best cordless vacuums on the market — and specifically, the newest models from Dyson's great competitor, Shark? Here's my long-term review.

Smooth mover

Let's start with what I love about our Dyson dust-sucker. The suction is excellent, and the Auto mode (where the suction will increase or decrease depending on how much dirt is detected on the floor) is a very welcome addition. I use this mode almost exclusively, and it can be relied upon to do a thorough job of clearing whatever debris has gathered on the floor. I haven't noticed a drop in cleaning performance over our two years of use.

The V15 is also extremely easy to maneuver. Our home has lots of stairs, and plenty of nooks and crannies where dust and hair like to collect and lurk, and the V15 Detect does a great job of getting into all of them. I love how easily and smoothly the head pivots, and the fact it can lie completely flat to the ground for cleaning under beds.

Many of the newest Shark vacuums have a hinge on the vacuum wand, which enables it to bend forwards for cleaning under furniture. It works well, but adds bulk to the wand, and the whole thing is slightly unwieldy in its folded state. For my home, the Dyson setup works perfectly well, but if you're lacking in maneuvering room, perhaps Shark's 'MultiFlex' / 'Flexology' solution would be a better fit.

I'm also a huge fan of the Dyson V15's secret crevice tool. It's hidden in the wand, so I'm never without it. Our house is tall and thin, with four floors, and this built-in tool means that if I spot a dusty corner at the top of the house, I don't have to traipse all the way down to the utility room to fetch a detail tool to deal with it. As far as I'm aware, this feature is exclusive to Dyson at the moment.

Having tested a number of vacuums from Dyson and various other brands, I'm always struck by how consistently high quality and well-built the Dyson vacs feel. There's a strong attention to detail in the design, and they feel sturdy and reliable. That's still true of the V15 after nearly two years of use.

Lasers and data

Now on to a couple of features that have divided opinion within my household. The V15 comes with a couple of different floorheads: the Digital motorbar head, which has bristles and is designed for use on any floor type, and the Fluffy optic head, which is entirely soft and built for use on hard flooring. The latter is equipped with a green light to illuminate dust.

I'm very on board with the Fluffy floorhead. I love that it feels gentle on our tiled kitchen floor (and doesn't clatter over it as most vacuum cleaner heads will), and I appreciate the way the light draws attention to dust and hair lurking in dingy corners. I find it very satisfying to then whisk that dust away, and always feel I'm getting a far more thorough clean than I would without this feature.

However, my partner is not so enamored with the Fluffy floorhead. He feels the Digital motorbar floorhead works perfectly well on hard floors, and it's not worth the hassle of swapping the heads over.

Then there are the real-time dust reports on the screen. I find these endlessly fascinating, and I enjoy seeing the dust hotspots causing the bar graphs to spike. However, when I asked my partner for his thoughts, it became clear that not only was he not paying them any attention, but he didn't really know what they were. Is is possible the general public is just not as invested in the intricacies of vacuum cleaning as I am? Maybe.

Bulking up

Moving on to the down-sides of the V15. The most significant complaint I have with it is that V15 Detect is that it's pretty heavy. Further to that, the weight is concentrated in the main motor section, which itself is rather elongated in shape. That makes it rather unwieldy, and especially when used in handheld mode.

All of Dyson's newer vacuums (I'd say from this model onwards — so the V15, the Gen5detect and the V16 Piston Animal) suffer from this weight distribution issue.

Looking to Shark's range, the fancier models, such as the PowerDetect Cordless, are actually heavier overall. However, the motor/handle section is more squat in shape, and there's more weight through the wand and into the floorhead. That means more even weight distribution, which can make for a more comfortable vacuuming experience.

A triggering issue

Another big complaint I have with the V15 is that it's trigger-operated, with no option to lock it for continual running. I find that irritating when I'm using the vacuum for long periods, or trying to get into awkward corners while keeping the trigger compressed.

I prefer the setup on Dyson's newer models, where there's a one-press power button. However, that's still not perfect — it requires you to have a hand free to turn the machine on and off, because the power button is not reachable from your holding hand.

Most modern Shark models use button operation, and just like the Dyson designs, you can't reach the button from your holding hand. My ideal design is one where the vacuum is trigger-operated but with a lock for continual running. No Dyson vacuum has this setup, and neither do any of Shark's newest stick vacs, although that brand's range is so sprawling you might find a trigger-plus-lock design somewhere.

One comment that I hear sometimes about Dyson stick vacuums is that they don't always last as long as customers expect. Our V15 is still going strong after just under two years (which is actually at the lower end of how long cordless vacuums are meant to last, although most people would probably hope for longer).

Prior to that, my partner had a Dyson Cyclone V10, which lasted over five years. At that point the battery conked out, and replacing it only fixed the issue for a few months. I think that's a decent lifespan for a vacuum, but your mileage may vary.

Is it worth it?

After two years using my Dyson V15, I'd still recommend it. Its cleaning powers are excellent with no signs of fading, its special features genuinely useful, and I love how maneuverable it is.

I personally also prefer it to Shark's newest models. I cover my main thoughts on this in my Shark vs Dyson article, but as a short overview, it's special features feel superior — Dyson's laser lights are far more effective than Shark's headlamps, and its Auto mode feels more precise. The Dyson also pivots more smoothly and the overall design feels sleeker and more high-end.

However, it's not a clear-cut decision. The Shark PowerDetect Cordless offers the best outright cleaning performance of any vacuum I've used, including all the Dyson models. Shark's models also arguably deliver better value for money — although its higher-spec models still sit in the premium price tier.

The bottom line? After using the V15 for a couple of years, and testing multiple other vacs from different brands including Shark, I'm still something of a Dyson fan-girl. When our at-home vac finally bites the dust, we'll probably end up buying another Dyson, although I will still be checking out what Shark has to offer...