Our sponge tooth erasers contain nano melamine cotton and polypropylene. It can deeply clean stains on the surface of teeth. Effective removal of stubborn stains, such as coffee, tea stains, restore white teeth. Its use method is very simple: 1. Soak the sponge in water, and then gently wipe the dirt on the surface of the teeth, and then gargle; 2. Please wipe with the side first, and then wipe. 3. Gaps between teeth and rough surfaces on the sides of teeth cannot be cleaned with this sponge. Do not wipe the surface of the tooth with the narrow side of the sponge. Not suitable for dentures. Deep clean to remove stubborn stains. Comfortable to hold and easy to operate.