HAND WASHING - SINGLE WASH METHOD. Use soap and warm running water. Rub your hands together for 20 seconds. Using a nailbrush, wash and brush each finger. Wash all parts of your hands including the back (or top) of hands, wrists, between fingers, and under fingernails. Rinse well under warm running water. Thoroughly dry hands with a clean paper towel. Using a paper towel instead of bare hands, turn off the water, open the restroom doors, and then throw away the paper towel.