Cleaning sensors robot vacuum cleaner Xiaomi S5: Complete guide with photos and tips

Why Xiaomi Sensors Are Sounding S5 require regular cleaning?

Xiaomi Mi Robot Vacuum-Mop S5 (and its modifications S5 Pro, S5 Max is equipped with more than a dozen sensors responsible for navigation, obstacle detection and cleaning control. Over time, dust, hair and greasy deposits settle on optical lenses, IR sensors and contact groups – this leads to false positives, garbage skipping or chaotic movement around the room. For example, a contaminated lidar (rotating laser sensor) begins to “go blind”, and the dust on the fall sensors makes the robot “fear” flat surfaces.

The manufacturer recommends cleaning the sensors every 2-3 months with heavy use, but in the realities of Russian apartments (with high dust and dry air in winter), the interval is reduced to 4-6 weeks.

• 🤖 The robot “cannot see” the wall and hits the furniture, although before he went around the obstacles.
• 🌀 On the map in the application Mi Home appear “ghost” walls or missing rooms.
• ⚠️ Xiaomi S5 Often stops with sensor error (code 10-12).
• 🧹 The vacuum cleaner ignores dirt on the floor or, conversely, "locks" on a clean area.

This article provides step-by-step instructions for cleaning each type of photo sensor, a list of tools you need, and ways to diagnose malfunctions after cleaning, all of which are safe to guarantee, unless you use abrasive materials.

What sensors are in Xiaomi S5 and where they are located

Xiaomi Mi Robot S5 There are 5 key sensor types, each of which requires a customized cleaning approach:

Before cleaning, be sure to turn off the robot (button) ON/OFF on the body) and remove the battery (unscrew) 4 screw on the bottom cover if deep cleaning is required. Use of wet wipes or alcohol above 70% can damage the anti-reflective coating of lidar and IR sensors.

⚠️ Warning: Do not blow into sensors with your mouth or compressor - this can damage the microphone membranes (in the case of a smear). S5 To remove dust, use only a soft brush or a compressed air cylinder (at 10 distances).+ centimeter).

Preparation of tools: what you need to clean

For high-quality cleaning of sensors Xiaomi S5 You don't need professional tools -- you need enough household appliances -- rule of thumb: no water, no aggressive solvents:

• 🧹 Soft art brush (with a width of 1-2 cm) or toothbrush with cropped bristles.
• 💨 Cylinder with compressed air (for computer equipment, without freon).
• 🧴 Microfibre wipe (without pile) and isopropyl alcohol 70% (only for contact groups!).
• 🔍 Lupa or flashlight – to assess the degree of contamination of lidar lenses.
• ⚙️ Plastic blade (for careful slinging of covers, if disassembly is required).

What can't be used:

• 🚫 Cotton swabs - villi remain on the lenses.
• 🚫 Soap solution or wet wipes - corrosion of contacts.
• 🚫 Sandpaper or metal objects – scratches on sensors.

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If you don't have isopropyl alcohol on hand, replace it with lens goggle wipes (soaked in a safe solution). Don't use monitor wipes, they contain silicone that leaves the film behind.

For convenience, prepare your workplace by putting a light cloth (to see the screws that fall out) and placing the tools in order of use. If you plan to clean the drop sensors, take a picture of their location in advance, which is symmetrical but has different sensitivity.

Step-by-step: how to clean lidar (LDS) Xiaomi S5

Lidar is the most important and vulnerable sensor in the robot, and contamination results in a loss of map accuracy (in the Mi Home app, rooms can move out or duplicate), cleaning requires care, and the lens is coated with a special compound that cannot be damaged.

Step 1. Dismantling the top cover.

1. Turn the robot over and unscrew 4 Torx screws T8 (They're hidden under rubber plugs).
2. Carefully tuck the lid with a plastic spatula, starting from the back (there are latches).
3. Disconnect the plume of the lidar power (it is fastened by a connector - do not pull the wires!).

Step 2. Clean the lens and mirrors.

• 🌀 Blow the lens with a compressed air balloon (hold the balloon vertically so as not to splash liquid).
• 🖌️ With a soft brush, remove dust from the mirror drum (spin it with your finger to reach all segments).
• 🧴 If there are greasy spots, wipe the lens with a dry microfiber (without alcohol!).

Step 3. Bearing check.

If lidar rotates with difficulty or creaks, drop 1 drop of silicone lubricant (for example, WD-40 Specialist) on the axle. Don't use lithium-based oils - they thicken over time.

Take a picture of the location of the plumes|Use only dry tools|Check the rotation of the drum after assembly|Do not touch the lens with your fingers-->

⚠️ Attention: After cleaning the lidar, the robot can "learn" again for the first 1-2 cleanings. This is normal - Xiaomi algorithms adapt to the changed light conditions of the lens. If after 3 cycles of cleaning the map is still distorted, repeat the cleaning or check the mounting of the plume.

Cleaning of IR sensors and drop sensors: nuances and errors

Infrared sensors (IR sensors) and cliff sensors (fall sensors) are most often affected by dust and hair, and are easier to clean than lidar, but require precision — for example, you can not confuse the upper and lower sensors when you reverse assemble.

IR sensors for obstacles:

• 📍 Located under transparent plastic around the perimeter of the body (front and sides).
• 🧹 Remove the dust with your brush, then blow with compressed air.
• 🔍 Check the integrity of plastic windows – cracks lead to false positives.

Fall sensors (cliff sensors):

1. Turn the robot over and find 4 black round sensors around the corners.
2. Moisten the cotton-coated disc with 70% alcohol and gently wipe the lenses (don’t press!).
3. Blow the holes with air - there accumulates pile and wool.

Typical errors in cleaning:

• ❌ Using alcohol for IR sensors – it dissolves the glue that fixes plastic windows.
• ❌ Excessive pressing on cliff sensors – they are attached to springs that can be bent.
• ❌ Skipping check after assembly: robot must "see" wall at a distance of 5-7 cm (checked manually).

After cleaning up Xiaomi S5 It's still "afraid" of dark surfaces (like black tiles), and it could be the calibration of the sensors:

1. Press the Spot Cleaning and Home buttons for 5 seconds.
2. Wait for the beep and reboot.
3. Start cleaning in test mode (room) 3×3 m without obstruction).

Optical dirt sensor and charge sensor: hidden problems

These two sensors are often ignored when cleaning, although contamination causes the robot to either not see dirt or refuse to charge.

Optical dirt sensor:

• 📍 It is located under the front bumper (a small window with a lens).
• 🛠️ To access, remove the bumper by snapping 2 clips on the sides.
• 🧴 Wipe the lens with a dry microfiber (no alcohol needed!).
• 🔍 Check: bring a dark object (for example, black paper) to the sensor - the robot must react with enhanced cleaning.

Charge sensor:

The contacts on the back of the robot and the docking station are oxidized by moisture.

1. Disconnect the robot from the station.
2. Wipe the contacts on both sides with a cotton swab soaked in an alcohol-acetic mixture (1:1).
3. Apply a thin layer of technical Vaseline (protects against oxidation).

⚠️ Warning: If the robot is not charging after cleaning the contacts, check the voltage at the dock with a multimeter. Normal values: 20–24 V at the output.

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Optical dirt sensor in Xiaomi S5 If the robot becomes worse at detecting contamination after cleaning, let it learn, run 2-3 cleaning cycles on different types of coatings (laminate, tile, carpet).

Diagnosis after cleaning: how to make sure everything works

Cleaning the sensors is only half the battle, and it's important to check that they work properly to avoid repeat failures.

Start building a map in a new room|Check your reaction to obstacles (hold your hand)|Make sure the robot is not afraid of dark surfaces|Check charging (should confidently "land" on the station)|Evaluate the quality of cleaning in a contaminated area-->

Lidar test:

• Start cleaning in an empty room. The map in Mi Home should be built in 3-5 minutes without "holes" or duplicate walls.
• If the robot "draws" ghostly objects, repeat cleaning the lens or check the mounting of the plume.

IR sensor test:

Put your hand in front of the robot 10 to 15 cm away, it should stop or change its trajectory, and if there is no reaction, wipe the sensors again (possibly there are alcohol stains left).

Drop sensor test:

Bring the robot to the step (without letting go!) The correct sensors fire at a distance of 3-5 cm from the edge. If the robot "falls down" - check the purity of the lenses and the integrity of the wiring.

If after all the manipulations, the problems persist, the causes may be deeper:

• 🔧 Damaged plume (often rubbed near the loop of the cover).
• 🔋 Firmware failure (reflashing through Mi Home is required).
• 🛠️ Mechanical damage (such as a crack in the lidar after falling).

FAQ: Frequent questions about cleaning Xiaomi sensors S5