1, first of all, to get a dirty cup, first of all, you need to soak the cup in water to soften the small stains around the cup. The soaking time of the cup is about 10 minute.

2. Then take out the cup and apply the toothpaste used for brushing your teeth around the cup. Be sure to paint everywhere.

3. Brush the surface of the cup several times with a toothbrush that you don't usually use after painting. No matter which corner you brush, don't let go of any corner inside and outside.

4, the bottom layer inside the cup, usually the toothbrush can not be brushed, and it is difficult to reach in, unless it is a very shallow cup, how to clean it if it is deep? There is a trick here, that is, put a paper towel on the toothbrush and wipe it along the edge, then the bottom of the cup will be very clean.

After brushing, we soak it in clear water for five minutes, and then rinse it directly with tap water.

6. Finally, wipe all the cups with water drops with a clean rag or paper towel, and place the cups with their mouths facing down. If the cup containing water is not cleaned and drained, it is easy to find traces on the surface of the cup, so remember to dry it after washing.