Our washing machine cleaning tablets are carefully formulated with sodium bicarbonate and sodium dodecylbenzene sulfonate. Designed specifically for efficiently decomposing stubborn stains in washing machine drums, removing detergent residues and mold. The usage method is extremely convenient: 1. Put this product into the washing machine. 2. After adding water, run for about 10 minutes. Soaking in warm water works well. 3. Turn off the power of the washing machine and let it soak for 2 hours. It is recommended to extend the soaking time when using for the first time. 4. Rinse again with clean water according to the standard washing mode of the washing machine. It also contains deodorizing factors, neutralizing the damp and musty odors, and keeping the air inside the washing machine fresh and odorless.