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

To clean the sensor and charging contacts on the Xiaomi Robot Vacuum X20+, use a soft, dry cloth to wipe the sensors, including:
1. LDS laser sensor:
Located on the top of the robot vacuum, it's a circular sensor that spins to map the room;
2. Bumper sensors:
These are located around the front of the robot vacuum and detect when the robot bumps into obstacles;
3. Charging contacts:
These are the metal contacts on the underside of the robot vacuum connected to the charging dock;
4. Cliff sensors:
Located around the edges of the robot vacuum underside and prevent it from falling down stairs or edges.