Solution:
Please check it according to the following methods:
1. Check whether the battery is exhausted and try to replace the battery;
2. Check whether the battery is installed in place, and pay attention to the anode and cathode not installed backwards during installation;
3. Check whether the battery cover is properly fastened. If the battery is not properly fastened, the battery will become loose;
4. Check whether Mi Automatic Foaming Soap Dispenser is turned on, and it is suggested to turn it on;
5. Check whether the hand sanitizer is exhausted. If so, please try to replace the sanitizer;
6. Check whether the bubble mouth of Mi Automatic Foaming Soap Dispenser is dirty, and try to clean it after shutting down;
7. Apply for after-sales inspection.