Although tooth washing can whiten teeth and achieve beautiful results, it is very harmful, because tooth washing only grinds off the dirt on the surface of teeth, that is, it cuts off a small layer of teeth, which is invisible to the naked eye. Every time you wash your teeth, there will be fewer teeth and the protective film will be damaged. Once the protective film is destroyed, your teeth will not be white. It is recommended not to wash your teeth. Don't brush at noon, just order.