Find two eggshells, crush them, put them in the pot, add a little water, cover them, shake the pot and let it sway everywhere. The tea rust in the pot was beaten by the egg shell, which was very clean. Then, rinse with clear water several times.
Other methods:
Pour the water out of the teapot teacup, squeeze a piece of toothpaste with an old toothbrush and brush it back and forth between the teapot and teacup. Because toothpaste contains both detergent and very fine friction agent, it is easy to wipe off the tea rust without damaging the teapot cup. After wiping, rinse with clear water, and the teapot cup will become as bright as new.
Tea rust (pinyin: cháxiù) refers to the brown substance attached to the tea set, especially on its inner wall. According to modern scientific research, tea rust not only contains organic substances such as tea polyphenols, but also contains a variety of inorganic salts.