Our Washing Machine Tank Clean Effervescent Tablets contain Cocamidopropyl Betaine, Disodium Edta, Sodium Bicarbonate. It can effectively sterilize washing machines, deep cleaning, and remove odors. Its use method is very simple: empty the water in the washing machine, without disassembling the washing machine, add 1-3 pieces of product, you can start a complete washing cycle, after the washing process is completed, you can clean the bottom tank of the washing machine. The unique foaming effect of the product makes the washing machine clean automatically, making it easier for people to do housework. Versatile, suitable for all washing machine models, making the washing machine clean and refreshing.