Must-Have for Large Floor-to-Ceiling Windows: ECOVACS WINBOT W2S PLUS Review

Introduction: The Glass-Heavy Home Dilemma

For homes with large floor-to-ceiling windows and extensive glass surfaces, cleaning those panes is the single biggest household headache – no exaggeration. My own home is a classic “glass-heavy” layout: the living room balcony is an oddly shaped enclosed space with a massive 2950×2550 mm floor-to-ceiling window as its centrepiece. Across three bedrooms, the kitchen and bathroom glass doors, plus an entire wall of black decorative glass at the entrance (3780×2340 mm), the aesthetic is stunning but the cleaning pressure is doubled.

Living on the 27th floor, hiring professionals for exterior window cleaning is out of the question – it’s simply too dangerous. Moreover, those large panes are multi‑layer laminated glass, far too thick for magnetic handheld cleaners. Therefore, a glass‑cleaning robot isn’t a luxury for me; it’s an absolute necessity.

I’ve been a loyal ECOVACS WINBOT user for years. I’ve compared the two main technical approaches in the market and found the square WINBOT design to be far more practical. I’ve also used the W836 and W1s PRO extensively. This time, I was lucky enough to test the brand‑new WINBOT W2S PLUS. I’ll be putting its three headline upgrades – large water tank for extended runtime, improved cleaning speed, and smart obstacle avoidance to prevent jams – through their paces in my real‑world home environment. I’ll cover multi‑window flats, high‑rise exterior glass, and decorative black glass, documenting both pros and cons to give you the most down‑to‑earth buying guide possible.

1. Unboxing & First Impressions

The W2S PLUS arrives in ECOVACS’ familiar cardboard box with a carry handle – handy for later storage. Inside, the main unit sits on the left, with the power adapter and accessories on the right.

Included in the box:

• Spare cleaning cloth
• A bottle of cleaning solution
• An extension cable (5.5 metres long) – easily long enough for my largest exterior pane.

The extension cable connector has been upgraded compared to the W1s PRO: it’s lighter, more compact, and the threaded part is now metal for improved durability and a more secure fit.

The robot itself sports a minimalist cream colour that fits any décor. The front panel mimics a fabric texture (though it’s actually plastic) – giving it a refined, elegant appearance while remaining easy to clean. In my opinion, the W2S PLUS is one of the best‑looking glass cleaners I’ve ever seen.

The large circular dial in the centre is cleverly designed as the cleaning‑fluid tank. The semi‑transparent plastic lets you see the fluid level at a glance, so you’ll never overfill. Capacity is a generous 120 ml, enough to clean up to 75 m² of glass continuously.

On the back, the power button has been removed – simplifying operation. The four corners now feature the new TruEdge 2.0 technology, a surprisingly innovative update. Even though previous square models had almost eliminated dead zones, ECOVACS has further refined the corner‑cleaning performance, closing the final tiny gaps.

2. 120 ml Tank + Triple‑Nozzle Wide‑Angle Spray – No Refills for Large Panes See Today’s Deal on Amazon

For my 7.5 m² floor‑to‑ceiling window, traditional cleaners fall short: the tank is too small, often forcing a mid‑job refill. That’s especially annoying for exterior glass – you have to call the robot back, refill, and then you can’t simply resume where it left off. Plus, most models use a single nozzle with narrow coverage and uneven mist, leading to dry wiping on large surfaces.

The W2S PLUS tackles this with its 120 ml tank. In my test on the 2950×2550 mm pane, a single fill lasted the entire cleaning session – no pauses. Since I was doing a thorough evaluation, I actually cleaned that window 6 times (4 deep, 2 quick) inside and out, and the tank still had half its fluid left. This capacity easily handles all the windows in a typical home without interruption.

For exterior high‑altitude work, the two‑way, three‑nozzle high‑pressure atomisation system really shines. The 60° three‑hole wide‑angle spray distributes a fine, even mist over a much larger area than single‑nozzle designs. This thoroughly wets dust, rain stains, and light limescale, while the robot’s steady wiping motion prevents dry streaks or water marks – leaving glass truly spotless.

I also tested it on my tricky black entrance glass. Black glass shows every water spot and lint fibre, demanding extreme precision. This panel is floor‑to‑ceiling and has always been difficult to clean manually.

The before shot clearly shows dust and lint at the bottom and corners. After a single pass with the W2S PLUS (using the dedicated cloth and cleaning fluid), the glass was crystal‑clear – no streaks, no lint, no residue. The improvement in clarity and overall appearance was dramatic.

3. Speed Boost – 46% Faster, No Sacrifice in Quality

Another major highlight is the speed increase. Travel speed is now 16 cm/s, and with upgraded Path Planning 4.0, overall efficiency is 46% higher. On my 2950×2550 mm window, Deep Clean mode took just 15 minutes, while Quick mode finished in only 8 minutes.

Crucially, the speed doesn’t compromise cleaning quality. Both modes maintain consistent wiping pressure and path coverage – no over‑lapping, no missed areas, and corner stains are still thoroughly removed. The old trade‑off between “fast but dirty” and “clean but slow” is gone. The three‑nozzle atomisation system ensures exterior glass is cleaned quickly and effectively.

Comparing before and after photos, the difference is striking – the glass looks significantly more transparent.

Zooming in on the top corners, the results are even more impressive: those stubborn rainwater marks completely disappeared.

To better illustrate the cleaning power, I deliberately scribbled on the window with a marker. A single Deep Clean pass wiped everything off cleanly – no repeated scrubbing needed. Incredibly time‑saving.

4. Smart Obstacle Avoidance – No Jams on Decals, Perfect for Complex Scenes See Today’s Deal on Amazon

The W2S PLUS also sees a significant upgrade in obstacle detection. This is my personal favourite and most essential improvement! My entrance black glass has permanent New Year decorative stickers – slight protrusions. Previously, my old robot would try to drive right over them, but halfway across, it would lose pressure and trigger an alarm, completely aborting the task. That’s exactly why that glass stayed so dirty.

I put the W2S PLUS through a dedicated sticker‑avoidance test. The new smart algorithm, combined with upgraded high‑stability suction, enables the robot to precisely detect tiny protrusions like stickers and sealant strips. It intelligently adjusts its path, smoothly circling around them – no jams, no stops, no error messages, no human intervention needed.

Both Deep and Quick modes successfully detected the stickers from both directions and turned around promptly. The obstacle‑avoidance performance exceeded my expectations – this big black glass finally has a solution.

Beyond stickers, I also tested it on glass sealant strips. The W2S PLUS clearly recognises raised strips and performs autonomous detours with excellent responsiveness. Whether stickers, sealant, or other common obstacles, the new system dramatically improves both compatibility and real‑world usability.

5. TruEdge 2.0 – Extreme Edge‑to‑Edge Cleaning

Traditional glass cleaners often do a good job in the middle but leave dust and white residue along window frames and corner gaps. The W2S PLUS with TruEdge 2.0 directly solves this by delivering full‑surface edge cleaning.

Unlike earlier square models, where the four corners were occupied by sensors with no cleaning function, TruEdge 2.0 introduces smart, dynamically lifting edge brushes. These brushes feature a uniform eight‑tooth interlocking structure and high‑density felt. They reach deep into the tiny gaps between the glass, sealant, and frame, then automatically retract after cleaning the edges. This not only ensures efficient cleaning but also protects the frame and sealant from secondary contamination.

I tested it on floor‑to‑ceiling windows, narrow‑frame windows, bathroom glass, and kitchen glass doors. In every case, the W2S PLUS adapted seamlessly, leaving corners and frame edges free of dust and residue – completely solving the “clean centre, dirty edges” problem.

In short, TruEdge 2.0 closes the final gap in fully automatic cleaning, eliminating the need for manual touch‑ups and delivering a truly comprehensive, no‑blind‑spot experience.

6. Triple Safety Protection – Confident 27th‑Floor Exterior Cleaning

For high‑rise exterior work, safety is paramount. The W2S PLUS retains ECOVACS’ mature safety systems, now with enhanced suction – 10,000 Pa – ensuring a firm grip on both dry and wet glass. Even with wind, there’s no wobbling or detachment. I verified this by hanging two 5‑kg bags of rice (total 10 kg) from the robot – it stayed firmly attached without any shifting.

The robot also features up to 30 minutes of continuous suction after power loss. I stood by the window for over 30 minutes to confirm this – the battery backup indeed lasts a full 30 minutes, with a flashing red light and a voice prompt every 30 seconds saying “Please connect to power.”

A high‑strength safety tether is built into the main unit and a carabiner hook is provided for anchoring to a fixed point. With this triple layer of protection, cleaning exterior windows on the 27th floor is completely worry‑free.

Additionally, if the cleaning cloth isn’t wrung dry properly or conditions are unsuitable, the robot stays safely attached and won’t start cleaning – it alerts you with voice and light prompts to remove and wring out the cloth, preventing potential mishaps.

7. Multi‑Scenario Cleaning – A Versatile Household Helper

The W2S PLUS isn’t just for windows. It works equally well on large bathroom glass panels and wall tiles. I gave it a try – the results were impressive.

Bathroom shower screens are notorious for causing issues: handles, hinges, and sealant strips often trap or confuse ordinary robots. I had never dared to use a glass cleaner in my bathroom before. But the W2S PLUS had no such problems – it cleaned efficiently and left the glass looking pristine.

My shower partition, over 4 years old, came out looking brand new after a single session.

8. Simple and Intuitive App Control See Today’s Deal on Amazon

Like its predecessor, the W2S PLUS is managed via the ECOVACS HOME app. Connection is quick: enable Bluetooth, open the app, scan the QR code on the machine, and you’re set.

For multi‑device ECOVACS users, the app shows all devices on separate tabs for easy centralised control – a seamless experience.

The app offers multiple cleaning modes; the default on the unit is Deep Clean, so you’ll need the app to switch modes. It also sends notifications after each session, listing any precautions.

A remote‑control mode is available within the app – essential for manually guiding the robot back in case of slipping or pressure loss, and for triggering extra spray on stubborn spots.

Summary & Buying Advice See Today’s Deal on Amazon

After a week of intensive real‑world testing across my entire home, the ECOVACS WINBOT W2S PLUS proves to be a thoughtfully upgraded glass cleaner. It addresses the traditional shortcomings – limited tank capacity, lower efficiency, jam‑prone behaviour, and slight edge‑blind spots – with comprehensive improvements in endurance, speed, and smart obstacle avoidance.

Whether you have large floor‑to‑ceiling windows, multiple panes, or live in a high‑rise, the W2S PLUS is an excellent fit – whether as a first purchase or an upgrade. It eliminates the hassle and danger of manual cleaning, significantly boosting your home comfort and peace of mind.