2: There is usually a hole behind the machine, and there is a net in the hole. After opening, take out the net bag and clean it.
3. After cleaning, find a small iron wire and pass it through the hole to see if there is anything like hair in it.
4. Find a pipe, connect it with tap water, and flush the water inlet with strong water pressure. You'll find it dirty inside.
5. After washing, put the net back and fill the small hole.
6. Reconnect the power supply and turn on the switch. The machine is in good condition. Just clean the filter once a month or so.