Please follow the steps below:

1. If you are using the device for the first time or if it hasn't been used for a long time, switch on the power mode for about 3 minutes.

2. Remove the clean water bucket and clean the pipe under the bucket in case of blockage. 

3. After clearing the blockage, fill the pipe with water and switch on the self-cleaning mode to see if the water goes down.

4. If it does and the problem persists, the clean water sensor may be broken.

RH1 currently supports English (by default), French, German & Italian.

To change the language, please follow the steps below:

1. Place RH1 on its charging base.

2. While the device is charging, press and hold the Mode Button for 3 seconds to enter the language change mode (language sequence: English, French, German, Italian).

3. Press the Mode Button once to switch to another language.

4. Press and hold the Mode Button for 3 seconds to exit the language change mode.