Our washing machine detergent powder contains isopropyl alcohol and disodium EDTA. It can be deeply cleaned to completely remove dirt from the washing machine tank. The ingredients are mild and harmless to the machine. Its use method is very simple: 1. Put the appropriate amount of this product into the washing machine. 2. Add water to high and run for about 5 minutes to completely dissolve the product. If dirt accumulation is serious, it is recommended to soak in warm water between 40°C and 60°C. 3. Suspend the operation and soak for 3 hours. When it is used for the first time or contaminated seriously, it is recommended to soak for 5-8 hours. 4. Follow the standard daily washing pattern of washer-rinse-dehydration and do it once. And you can use the upgraded formula to deep clean stubborn stains in the washing machine tank.