China is the hometown of tea, tea, tea, tea history is long. Folk is circulating a proverb: " early morning a cup of tea, starved to death selling medicine man", visible health benefits of tea is unusual. At the same time, our country has a common saying, " do not wash cup tea, Hades killed rush ." that is, tea is healthy, but the errors in the tea drinking habits will bring the opposite result, " do not wash the cups " is one of the most common. No longer drink or tea is exposed in the air, tea polyphenol in tea leaves and tea stain of metal elements in oxide form occurs, tea scale, attached to the cup wall, and the " filthy " is the arch-criminal of harm to human health. Because tea scale contains cadmium, lead, mercury, arsenic and other toxic and carcinogenic substance such as nitrite. These substances enter the human digestive system, and is rich in protein, fatty acids, vitamins and other combination, not only hinder the body's absorption of these nutrients and digestive, will make the stomach and other organs damage. In addition, regular cleaning teacup, also have more scale, which also contains large quantities of heavy metals, the health of the business. If the cup is filled with tea scale, can use several methods to remove: using an old toothbrush toothpaste squeezing in the teapot cup, or rub the brush back and forth, because in the toothpaste with detergent, and very fine friction agent, it is easy to wipe tea stain without injury pot Cup, wipe the then rinse; heating the vinegar or soda water soak 24 hours, then repeated washing, can also be cleaned. Cleaning should be paid special attention to the cup, because the residues in the cup exterior slobber and tea mixture, exposed in the air, more easy to breed bacteria.