1. Close the inlet valve, open the drain valve, and drain the water in the tank;

2. Clean the perimeter and bottom of the water tank with a clean rag. If the bottom is heavily fouled, use a soft towel and detergent to scrub;

3. open the inlet valve, put the appropriate amount of water to wash the wall and bottom of the barrel, so that the dirt is drained from the sewage outlet, if necessary, can be repeated several times until satisfactory;

4. Close the drain valve, open the inlet valve, and let the tank refill with water. The cleaning is over.