Let the paste rest on the stain for at least an hour. The bigger the stain, the longer you should wait. After an adequate waiting period, wash the clothing according to the wash label. After the wash cycle is complete, check to make sure the stain has been removed before moving things to the dryer. If not, reapply the paste and return to the wash. Repeat as much as needed. Once the stain is gone, dry the clothing according the wash label. Image.