1. Dip your finger in salt and brush it back and forth over the tea stains. It only takes two or three minutes, and you will find that the tea stains magically disappear, and it is not easy to hurt the cup.

2. Rinse the cup with water first, without leaving any water, then rub it on the cup wall with toothpaste, and then rinse it with water.

3. Using peel instead of melon cloth, dipping in salt and brushing tea stains can also achieve unexpected good results.