2. When cleaning, we can dip a little soapy water or detergent first, and then dip the water on the writing surface by dipping it in water.
3. When cleaning, you must pay attention to it. Only the writing side can be dipped in water, and the other side can't be dipped in water. And when washing, you must wipe it gently with your hands, not forcibly.
After washing, when we want to wash soapy water, we can put a basin of water in the basin first, and then wipe the water cloth bit by bit.