Cleaning the sensors of the robot vacuum cleaner Xiaomi: why it is critical and how to do it correctly

Xiaomi’s robot vacuum cleaners are smart assistants that save you time, but their effectiveness depends on the state of the sensors. Dusty or contaminated sensors lead to chaotic cleaning, collisions with furniture, mapping errors and even a complete stop of the device. For example, a laser rangefinder (LDS) Mi Robot Vacuum-Mop 2 Pro or DreameBot Z10 Pro when hit by dust begins to “blind”, and infrared sensors anti-fall stop recognizing stairs.

In this article, we will look at all the sensor types in Xiaomi’s robot vacuum cleaners (including the Dreame and Viomi sub-brands), explain how to clean them properly, and explain the hidden consequences of neglecting care, from increasing power consumption to failure of the control board, you will learn which tools to use and which tools are strictly prohibited, and how often to perform the procedure for different models.

What sensors are in the robot vacuum cleaners Xiaomi and what they are responsible for

Xiaomi's modern robot vacuum cleaners are equipped with a set of sensors, each of which performs its own function, and their pollution manifests itself in different ways, from minor failures to critical errors.

• 🔦 Laser rangefinder (LDS) — scans the room for building a map (is in models with LDS The name of the game is Mi Robot Vacuum-Mop. P10). When polluted, the robot “lost” or draws a map with distortions.
• 👁️ Infrared sensors detect obstacles and edges of steps. If dust blocks the IR emitter, the vacuum cleaner can fall down stairs or beat against the legs of the table.
• 📏 Collision sensors (bumper) are mechanical or optical sensors that act upon impact, and pollution leads to false positives or, conversely, a lack of response to obstacles.
• 🧲 Mud sensors – analyze the level of floor contamination (for example, in DreameBot) W10). If not cleaned correctly, false signals can be given about the “clean” floor.
• 🔋 Charge sensors monitor battery levels, and dust on dock contacts or vacuum cleaners causes charging errors.

Budget models (e.g. Mi Robot Vacuum-Mop Essential) may not be available. LDS, But there are always IR sensors and bumper sensors, and premium versions like the Xiaomi Robot Vacuum-Mop 2 Ultra add cameras for the camera. 3D-Cartography and gyroscopes that also require care.

Signs that robot vacuum cleaner sensors are contaminated

How do you know when it's time to clean your sensors?

• 🌀 The robot moves chaotically, ignoring the usual route (especially relevant for models with a high-speed speed). LDS).
• 🚪 It is against walls or furniture, although it has previously been around obstacles.
• 📉 On the map in the application Mi Home appear “ghost” walls or missing rooms.
• ⚡ Suddenly discharges or refuses to charge at the docking station.
• 🔄 Error 10 (navigation problems) or Error 12 (decay sensors).

If your vacuum cleaner starts to behave like this, don't rush to bring it to the service. In 80% of cases, the problem is solved by a banal cleaning of the sensors. LDS fall).

⚠️ If the robot after cleaning the sensors still gives an error Error 9 (a problem with the laser), do not try to disassemble the sensors. LDS It's self-sustaining, it requires calibration at the service center, and it can cause the module to fail completely.

What can and cannot be cleaned sensors robot vacuum cleaner Xiaomi

Not all devices are suitable for sensor care, and the use of the wrong materials can damage optics or electronic components, and this is what is allowed and forbidden:

To clean the laser rangefinder (LDS) You should use a special wipe for optics, because it doesn't leave any wiring. If you only have microfibers on hand, make sure that it's absolutely clean: even a small speck of dust on a napkin can scratch the glass when you press it.

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Before cleaning the sensors, always turn off the robot vacuum cleaner and remove the battery (if possible according to the instructions), this will prevent short circuits when moisture enters.

Step-by-step: how to clean the sensors of the robot vacuum cleaner

The cleaning process depends on the type of sensor. Below is a universal instruction that is suitable for most Xiaomi, Dreame and Viomi models. If your vacuum cleaner has a unique design (for example, Xiaomi Robot Vacuum-Mop 2 Ultra with a camera), refer to the section about the specific model.

1. Cleaning the laser rangefinder (LDS)

LDS — It's the most sensitive sensor. It's located under a rotating transparent cover (it's usually black in Mi Robots, it's gray in DreameBots:

1. Scroll the lid carefully. LDS counterclockwise to remove it (do not make an effort - it is removed easily).
2. Remove dust from the inside of the lid with a soft brush.
3. Wipe the laser glass with a dry microfiber wipe in circular motions (don’t press!).
4. If there are greasy spots, use a napkin soaked in 70% isopropyl alcohol.
5. Blow the hole LDS compressed air (hold the balloon vertically so as not to splash liquid).

Cleaning infrared sensors

The IR sensors are located around the perimeter of the body (usually under black or silver eyes) and cleaned as follows:

1. Wipe the surface of the sensors with a dry cotton swab.
2. To remove sticky dirt, use an alcohol napkin (do not drip alcohol directly on the sensor!).
3. Check that after cleaning on the sensors there is no pile of cotton.

3. Cleaning bumper sensors and charging contacts

The bumper sensors are under the rubber lining on the front, and the charging contacts are on the bottom of the case, and there's the most dirt going to accumulate here.

1. Remove the rubber bumper (in most models it is mounted on latches).
2. Remove dust from under the bumper with a brush or vacuum cleaner at minimum power.
3. Wipe the charging contacts with an alcohol napkin (if they are oxidized, use an eraser for cleaning).
4. Check the spring contacts at the docking station – they also require cleaning.

After cleaning, let the robot stand for 10-15 minutes to vaporize the alcohol.

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Cleaning. LDS It is enough to carry out IR sensors 1 time every 2-3 months. bumper sensors and charging contacts are cleaned more often - once a month or after every 10th cleaning.

Features of cleaning sensors in popular models Xiaomi

Some robot vacuum cleaners have unique sensors or design features, and let's look at the nuances for the most common models.

Xiaomi Mi Robot Vacuum-Mop 2 Pro

In this model LDS It's located under a removable black lid with the Xiaomi logo:

• Cover LDS It is shot counterclockwise but requires little effort (it has a magnetic fixator).
• Under the lid there is a small indentation - there accumulates dust, which must be removed with tweezers.
• They are only stained with a dry brush, they are afraid of moisture.

DreameBot D9 / Z10 Pro

These models use a hybrid navigation system (LDS + Additional activities:

• The chamber (located in front under glass) is wiped with microfiber without alcohol.
• Anti-fall sensors (4 pieces on the sides) are cleaned with a cotton swab dipped in alcohol.
• After cleaning, be sure to check the camera calibration in the Dreame app settings.

Viomi V3

Viomi V3 It has a non-standard arrangement of IR sensors, which are hidden under a decorative panel:

1. Remove the upper cover (it is attached to 2 latches in front).
2. Wipe the sensors with a dry wipe – they are very sensitive to moisture.
3. Check the rubber seals on the lid: if they are worn out, the sensors will get dirty faster.

For models with automatic brush lifting (e.g. DreameBot) W10) After cleaning the sensors, it is recommended to start a test cleaning cycle to check the correctness of the height sensors.

Frequent mistakes when cleaning sensors and how to avoid them

Many users make the same mistakes that lead to breakdowns, and here are the most common ones:

• 🧴 Use of aggressive cleaning products (e.g, WD-40 They destroy the protective coatings of lenses and plastic.
• 💦 Moisture entering the case, even a drop of water on the board can cause corrosion. Always use a minimally wet wipe.
• 🔧 Disassembly LDS Laser module requires precise calibration, so once disassembled, the robot can stop seeing obstacles.
• 🧲 Ignoring magnetic sensors (in virtual wall models) must be cleaned of metal dust.
• 🔄 Cleaning only the outer surfaces, and the dust accumulates inside the body, for example, under the lid. LDS or in the vents.

Another common mistake is to peel the sensors by eye, for example, users often miss the drop sensors because they're small and down, and yet contamination is one of the main reasons why robots fall down stairs.

⚠️ Warning: If the robot becomes even stranger after cleaning (for example, spinning around or not responding to commands), check if you have knocked down the calibration settings. → Reset).

How to prolong the life of sensors: prevention and care

Cleaning sensors regularly is good, but it's even better to prevent them from getting dirty, and here are some tips to help reduce the frequency of care:

• 🏠 Remove long-pile carpets – they clog up anti-fall sensors and bumper sensors.
• 🚫 Don't smoke in the room where the robot works. Nicotine plaque settles on the lenses. LDS and impair their transparency.
• 🐾 Wash floors regularly (if the model has a wet cleaning function) and dust mixed with water forms a sticky plaque on the sensors.
• 🔋 Use a brush cleaning dock (if supported by your model) to reduce the amount of dust that gets inside the body.
• 📱 Update the firmware. New software often improves the algorithms for processing sensor signals, which compensates for the slight contamination.

If you live in a very dusty area or have animals at home, you should clean the sensors more often - every 3-4 weeks. To check the condition of the sensors, you can use the test modes available on the engineering menu (how to get there - read the instructions for your model).

FAQ: Frequent questions about cleaning sensors of Xiaomi robot vacuum cleaners