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How to clean the sensors and charging contacts of the Xiaomi Robot Vacuum X20 Pro?

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How to clean the sensors and charging contacts of the Xiaomi Robot Vacuum X20 Pro?

Use a soft cloth to clean all sensors and charging contacts in the robot vacuum: 
1. The cliff sensors on the bottom of the robot vacuum;
2. The charging contacts on the back of the robot vacuum;
3. The LDS laser sensor on the top of the robot vacuum;
4. The bumper and the line laser sensor on the front of the robot vacuum.
Note:
The black lens area of the robot vacuum and the omni station can not be obstructed, dirty, or worn, otherwise, it will cause abnormal functions such as recharging and obstacle avoidance.