I just came across some very dirty doll clothes made from old feed sacks. My solution is to soak them in Biz and cold water for a couple of hours-proportions as listed on the box. Then rinse again in cold water. If they still need cleaning do another soak, but now that the dirt has been soaked out it can soak for a longer period of time, ie overnight. After a final rinse in cold water, let them air dry and should be ready to use.