Our washing machine cleaning tablets contain baking soda, lemon extract. It kills bacteria efficiently, cleans deep and removes odors. Its use method is very simple: 1. Wash the clothes in the washing machine. 2. Place the cleaning sheet in the washing machine. 3. Start the washing machine self-cleaning mode. 4. After cleaning, wipe off residue. And can protect the washing machine liner, so that the washing machine longer service life.