Why does the Xiaomi Robot Vacuum S20 need to be wiped its appearance regularly?

The Xiaomi Robot Vacuum S20 is a cleaning appliance with cleaning functions such as sweeping, mopping, and collecting garbage. Regular dumping of garbage, cleaning mops and roller brushes can restore the cleaning ability of the sweeper.
The Xiaomi Robot Vacuum S20 is covered with various sensors. It needs to explore the surrounding environment, build a map and avoid obstacles. Therefore, when the equipment is dirty, please clean the surrounding dust with a wet rag that has been wrung out of water in time to remove the mixed foreign matter to restore the obstacle avoidance and recognition capabilities of the sweeper.
Note:
Do not use chemicals such as detergents or sprays for cleaning.