How to Clean the Sensors of the Xiaomi Mi Robot Vacuum 1S: Complete guide with photos and tips

Xiaomi Mi Robot Vacuum Robot Cleaner 1S — It's one of the most popular cleaning assistants, but it's very much dependent on the cleanness of the sensors, and dusty sensors can cause random movement, debris flowing through, or even falling down stairs. 1S, How to Clean Them, What Tools to Use, and What Errors 90% of Users Make.

Features of Xiaomi 1S — laser-rangefinder (LDS), We've got infrared sensors and optical drop sensors, and each requires a different cleaning approach, like a laser module that can't be wiped with alcohol, and an IR sensor that's afraid of moisture, and we've put together proven methods that will extend the life of your vacuum cleaner and save you money on repairs.

Importantly, if the robot still goes blind or behaves strangely after cleaning, the problem may be firmware or mechanical damage, and at the end of the article, there's a checklist for diagnosing malfunctions.

What sensors are in Xiaomi Mi Robot Vacuum 1S And what are they responsible for?

Model 1S It has five sensors, each of which affects navigation and safety:

• 🔦 Laser rangefinder (LDS) — And the lens is a rotating module on top, it's mapping the room, and the lens contamination is causing you to drive around in a drunken circle.
• 👁️ Infrared sensors -- located around the perimeter of the housing, detect obstacles and walls, and the dust on them causes the robot to "not see" furniture.
• 🔽 Fall sensors, an optical sensor under the front bumper, prevents you from falling down stairs, and if it's contaminated, the robot can come on carpets from the edges.
• 🔋 Charge sensors -- contacts on the back, responsible for the docking station. Oxidation causes charging problems.
• 🧲 Magnetic sensors respond to virtual walls and cleaning areas, rarely contaminated, but can stick metal shavings.

The most vulnerable — LDS They're cleaned monthly for heavy use (daily cleaning) or every 3 months for rare use. Fall sensors are checked every six months if there are no stairs in the house - less often.

Signs that Xiaomi sensors 1S polluted

The vacuum cleaner doesn't say "mine." LDS “He was dusty,” but his behavior eloquently signals problems:

• 🌀 Robot Loses Orientation Due to Dirty Laser Module.
• 🚧 Furniture strikes – IR sensors don’t recognize obstacles if they’re covered with dust.
• 🪜 Falling from stairs – optical drop sensor does not work due to dirt on the lens.
• 🔄 Constant reboots – may indicate problems with charging contacts.
• 🗺️ Non-saving map – laser sensor cannot scan the room correctly.

Critical symptom: the robot starts cleaning, but after 5-10 minutes stops with the error "Clean the sensors" (Error code 9 or 10 in the Mi Home app). LDS In 80 percent of cases, the problem is solved by cleaning without going to the service.

⚠️ Warning: If the error remains after cleaning, check the integrity of the rotating glass LDS. Cracks or chips require a replacement module.

What you need to clean the sensors: tools and materials

Do not use the first rags or cotton swabs you find - they can scratch the lenses or leave a pile.

What can't be used:

• 🧴 Household chemicals (soap, detergents) - leaves divorces on the lenses.
• 🧻 Paper towels – scratching the surface.
• 🔥 Hot water or steam – damages electronics.
• 🧲 Magnets – can disrupt the compass of the robot.

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If you don't have isopropyl alcohol on hand, use vodka without additives (a strength of 40% or higher) which is less effective, but will not damage the electronics.

Step-by-step: how to clean the sensors Xiaomi 1S

Turn off the vacuum cleaner and take out the battery (if you can), which will prevent accidental switching on during cleaning, and if the battery is difficult to remove, just turn off the power button on the case.

1. Cleaning of the laser rangefinder (LDS)

This is the most important and delicate sensor.

1. Remove the rotating glass LDS, Then, pull it up (do not make any effort!).
2. Blow the inner cavity with compressed air (hold the balloon vertically so that no liquid is splashed).
3. Wipe the glass with a microfiber soaked in isopropyl alcohol (do not drip the liquid directly onto the sensor!).
4. Remove dust from the mirror inside the module with a soft brush.
5. Install the glass back - it should rotate freely, without creaking.

Cleaning infrared (IR) sensors

The IR sensors are placed under a black stripe around the perimeter of the body, and they're cleaned like this.

1. Wipe the strip with a dry microfiber along without pressing.
2. For hard-to-reach places, use a cotton swab dipped with alcohol.
3. Blow the sensor holes with compressed air (do not bring the balloon closer than 5 cm).

3. Cleaning the drop sensor

It's located under the front bumper, so you can get there.

1. Remove the bumper by snapping the latches on the sides (use a plastic shoulder blade).
2. Wipe the sensor lens with a dry microfiber – it is very sensitive to moisture!
3. Make sure the lens is free of scratches, and if there are, the sensor needs to be replaced.

4. Cleaning charging contacts

Oxidized contacts lead to poor charging.

1. Wet the cotton swab in isopropyl alcohol.
2. Gently wipe the contacts on the vacuum cleaner and docking station.
3. Let dry for 5-10 minutes before connecting.

Make sure all sensors are dry|Check the rotation. LDS-glass|Remove the pile from the microfiber|Secure the bumper before clicking.|Test run without cleaning-->

Frequent errors when cleaning Xiaomi sensors 1S

Even experienced users sometimes make problems worse.

• 🧴 Use wet wipes - leave divorces on LDS, laser-scatter.
• 🔧 Disassemble LDS-Module – inside a precise optics that is easily damaged.
• 💨 Blowing with the mouth – saliva hits the lenses and attracts dust.
• 🧲 Cleaning a magnetic sensor with metal objects – it violates its calibration.
• 🔥 Dry with a hair dryer - overheating damages plastic parts.

Another common mistake is to clean the sensors by eye, for example, users often forget about the drop sensor because it's hidden under the bumper, and pollution is the main reason why the robot falls down stairs.

⚠️ If after cleaning the robot became worse to navigate, check if the calibration is lost LDS. Press the Spot and Home buttons for 5 seconds.

How often to clean sensors: maintenance schedule

The frequency of cleaning depends on the intensity of use and conditions in the house:

Additional factors accelerating pollution:

• 🐕 The presence of pets (wool sticks in sensors).
• 🏗️ Repair in the apartment (building dust is especially dangerous for the construction of the house) LDS).
• 🌿 Houseplants (pollen settles on sensors).
• 🚬 Smoking indoors (tar sticks to lenses).

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Regularly cleaning sensors extends the life of the robot by 30-40%. LDS-Modules – Ignoring maintenance.

What to do if the robot is not working properly after cleaning

If the cleaning didn't work, the problem could be deeper.

1. Update your firmware through the Mi Home app. Outdated software can cause navigation errors.
2. Reset to factory settings: press the Power and Spot for 10 seconds.
3. Check the map of the room - if it is "teared", recreate it (remove the old one in the application).
4. Inspect the wheels and brushes – jammed parts can affect the motion sensors.
5. Test in another room – there may be too many reflective surfaces (mirrors, glass) in your room that knock down the surface. LDS.

If the robot gives an error of 9 ("Contaminated sensor") even after cleaning, try:

• Blow through LDS-module with a more powerful airflow (for example, a vacuum cleaner on the blown out).
• Check the integrity of the rotating glass – cracks are not always visible to the naked eye.
• Run the calibration of sensors through the engineering menu (for this you need to connect to the robot on the computer). SSH).

FAQ: Answers to Frequent Questions about Xiaomi Mi Robot Vacuum Sensors 1S