Please refer to the following steps:
1. When the Xiaomi Smart Inverter Dehumidifier prompts “Please clean the filter promptly”, please press the On/Standby button and disconnect the power supply;
2. Then, remove the filter to inspect it for dirt. If the filter is dirty, clean it according to the provided User manual;
3. If the filter does not appear dirty or if it's a false alarm, you can reset the filter directly through the Mi Home/Xiaomi Home APP, and the dehumidifier will beep to indicate that the reset has been completed.