1. When the Xiaomi Robot Vacuum X20+ works on smooth tile floors or wooden floors, it can generate slight noise from the contact between the bottom brush and the floor. When the robot passes over tile or floor joints, it will make a slight clicking noise as it contacts and cleans these joints. These noises do not affect the normal use of the machine;
2. It is normal that the Xiaomi Robot Vacuum X20+ makes strange noises during docking. Because it will turn on its water pump in advance during docking, which will cause the noise.