The function of “cleaning along the edges of furniture” in vacuum cleaners Xiaomi: why you need and how to use it correctly

Have you ever noticed how Xiaomi's robot vacuum cleaner gently skirts the legs of a chair or presses itself against the board, as if sticking to the edge? It's not a coincidence, but the work of a special algorithm, cleaning along the edges of furniture, a feature that many users do not even know about, despite its presence in most modern models of the brand. But why is it needed, how does it turn on and why sometimes the vacuum cleaner ignores the edges, leaving dust there?

In this article, we will explore what lies behind the term “cleaning along the edges” in the Xiaomi documentation, what technologies are responsible for this (spoiler: it is not only sensors, but also complex trajectories), and how to get the robot to pay more attention to the corners and joints, and also reveal the secret why this function works better in some models than in others, and how this relates to the shape of the vacuum cleaner body.

What is “cleaning along the edges of furniture” and how does it work?

Edge cleaning is a robot vacuum cleaner's motion algorithm that makes it focus on areas adjacent to walls, furniture, and other vertical surfaces, because it's where up to 70 percent of the dust and debris accumulates -- because of airflow, traction, and normal household activity -- and Xiaomi implemented this feature in early models, but it's gotten smarter with each generation.

How does it work technically? The robot uses a combination of:

• 📏 Infrared sensors – determine the distance to the obstacle (for example, the legs of the sofa) and adjust the trajectory.
• 🧭 Gyroscope and accelerometer – help to keep a given distance from the edge (usually 1-3 cm).
• 🤖 Algorithms SLAM (Simultaneous localization and mapping – build a virtual map of the room and mark the “edge” zones on it.
• 🌀 Side brush - in models with a round body, it sweeps debris from the corners to the main suction hole.

Interestingly, Xiaomi's D-shaped vacuum cleaners (such as the Mi Robot Vacuum-Mop 2 Pro) clean the edges more efficiently, thanks to a flat front that allows you to get closer to the wall. In round models, a side brush is responsible for this, but its efficiency depends on rotational speed and wear.

What Xiaomi models support this feature

Almost all Xiaomi robot vacuum cleaners since Mi Robot Vacuum 1 (2016) can clean along the edges, but the implementation is different.

Note: in models without a side brush (for example, Mijia) 1C) The edge-cleaning function works worse -- the robot just drives closer to the wall, but can't physically pick up debris from the corners. D9 Double brushes are 40% more effective, according to the tests.

⚠️ Attention: If your vacuum cleaner ignores the edges, check the condition of the side brush - it may have clogged or broken. In models with a D-body, the problem often lies in the wear of rubber seals around the perimeter.

How to enable and configure edge cleaning in the Mi Home app

By default, the edge cleaning function is activated in most Xiaomi robots, but it can be customized to your needs. Instructions for the Mi Home app (current for firmware 2023-2026):

1. Open Mi Home and select your vacuum cleaner.
2. Go to Settings → Cleaning modes.
3. Find the item Cleaning Edges (or Edge Cleaning in English version).
4. Activate the slider and select the intensity: 🌪️ Weak – the robot will pass along the walls 1 time. 🌀 Average - 2 passes from different sides. 🔥 Strong - 3 passes + suction.

Save the settings and start cleaning.

Some models (such as the Robot Vacuum-Mop 2 Pro) have a separate Edge Cleanup mode that can be manually run.

Main screen → Modes → Cleaning edges → Select a zone

Check the sidebrush for blockages.|Make sure the boards are clean (the robot may get stuck)|Close the doors to other rooms|Remove wires and small objects from the floor-->

Tip: If your vacuum cleaner constantly “loses” edges, try updating the firmware through Settings → Software Update. In versions older than 3.5.8, bugs with plinth recognition are fixed.

Why vacuum cleaners are bad at cleaning edges: typical problems and solutions

Even in top Xiaomi models, the edge cleaning function may not work perfectly, and here are the most common reasons and ways to eliminate them:

• 🔄 Robot doesn't drive close to the wall: Reason: contaminated sensors or weak battery (robot saves charge) Solution: wipe the IR sensors with alcohol, charge the vacuum cleaner to 100%.
• 🧹 Garbage stays in corners: Reason: worn sidebrush or wrong mode. Solution: Replace brush (Article for Mi Robot Vacuum) 1S — ZSTN04WM) Or turn on the “Strong” Cleaning mode.
• 🚫 Vacuum ignores the edges altogether: Reason: firmware failure or disabled function in settings. Solution: reset to factory settings (Settings) → Reset) and update the software.
• 📉 Uneven cleaning: Cause: uneven floor or obstructions (such as a high threshold).Solution: use virtual walls in the app to limit the cleaning area.

⚠️ Attention: In vacuum cleaners with laser navigator (LDS) The solution is to close the curtains while cleaning or to move them to the evening.

Comparison with competitors: who is better at cleaning the edges

Xiaomi is not the only brand that pays attention to cleaning edges, for objectivity, compare their robots with their counterparts from Roborock, Ecovacs and Dreame (all models are 2023-2026):

As you can see from the table, Xiaomi loses Ecovacs and Roborock exactly, but wins in price. For example, Robot Vacuum-Mop 2 Pro costs 1.5-2 times cheaper than Deebot T10 Omni, while the difference in the quality of the edge cleaning is only 5%.

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If you're critically interested in perfect corner cleaning, look for a rotating sidebrush (like the Roborock S8) that sweeps up debris from even the narrowest slits where the round body can't reach.

Practical tips: how to improve cleaning edges

Even with factory settings, you can improve cleaning efficiency. Here are some proven life hacks:

• 🔧 Adjust the height of the side brush: In models with adjustable mounting (for example, DreameBot). D9) lower the brush 1-2 mm lower - so it will be better to sweep the garbage to the main suction hole.
• 🗺️ Configure virtual zones: In Mi Home, create a separate "Edge" zone and set a heightened cleaning mode for it. How to do this: Map → Edit → Add a zone → Set aside the edges → Save.
• 🔄 Clean the sensors weekly: IR sensors and lidar get clogged with dust, causing the robot to "not see" the edge. Use cotton swabs and alcohol to clean up.
• ⚡ Update the algorithms: Xiaomi firmware has improved angle recognition after 2023.12. Check the relevance of the software in Settings → Update.

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The most effective way to improve edge cleaning is to combine Strong mode with virtual zones, which increases cleaning time by 15-20%, but garbage is collected from even the most problematic places.

Myths and misconceptions about cleaning edges in vacuum cleaners Xiaomi

There are many myths surrounding this feature, and we'll look at the most popular ones.

• 🤖 «The robot knows where it is dirtier and pays more attention to these places» ❌ Reality: Xiaomi's algorithms don't analyze pollution levels in real time; they're infollowing pre-programmed trajectories; camera models (e.g., Roborock) are not excluded. S7 MaxV, but Xiaomi doesn’t have one yet.
• 🔋 «Cleaning the edges strongly planted battery» ⚠️ Partly true: Strong mode increases charge consumption by 10-15%, but not critically. Modern models (for example, Xiaomi Robot Vacuum-Mop 2 Pro) cope with cleaning 100 m2 even with the function on.
• 🧽 «The side brush scratches furniture and boards» ✅ True, but solvable: Use silicone brush nozzles (sold separately) or turn it off in the settings if the house has laminated furniture.
• 📱 «In cheap models, this function is useless» ❌ Reality: Even the budget Mijia 1C It can clean the edges at 70 percent efficiency of flagships, and the difference is in the details (speed, number of passes).

If you’ve heard of other “facts” about Xiaomi vacuum cleaners, check it out in official documentation or tests – for example, on the Smart Home Lab channel on YouTube, where robots are regularly tested in real-world conditions.

FAQ: Frequent questions about cleaning edges