Mainly for the roller and the filter of the washing machine. The cleaning of the washing machine filter, just take off the filter and rinse it, but it should be noted that it must be cleaned regularly to be guaranteed; The drum washing machine is relatively complicated, because the dirt hidden between the inner bucket and the outer bucket we usually can't see, according to the capacity of the washing machine, half a bottle to a bottle of edible vinegar into the washing machine inside the bucket, warm water to 3/4 bucket high, soak for 2 to 3 hours, and then start the washing machine 10 to 20 minutes later, put the dirty water and then inject water. Rinse for 10 to 15 minutes and you're done.