Methods to remove tea stains: (1) Remove tea stains from metal tea separators. When using metal tea separators, they will become black due to tea stains. For example, use a medium-sized detergent. If it cannot be washed off, it can be soaked in vinegar or bleach to easily remove the dirt. (2) Remove the tea stains on the tea cups or teapots. After using the tea cups and teapots for a long time, there will be a lot of tea stains. Soak them with a sponge.