Take a proper amount of toothpaste and brush it with a cup brush in the place where there is tea dirt in the cup, then clean it.

Because the sponge-like cup brush has poor effect and is easy to damage the cup with thin cup wall, the principle of toothpaste to clean the tea dirt in the cup depends on the tiny friction agent and detergent in toothpaste.

Toothpaste, as a necessity in our daily life, is both practical and convenient for cleaning tea stains in tea cups. If you use toothpaste to clean tea cups, especially those with thin cup walls, such as caps, it is recommended to use a cup brush with bristles similar to a toothbrush.