Grate one bar of Fels Naptha Soap into a kettle of hot water. Let this dissolve.
Mix one cup of borax and one cup of washing soda in a 5 gallon bucket with warm water.
Add the dissolved bar of soap and hot water to the bucket, stir it together, and fill the rest of the bucket with hot/warm water.
Let it sit over night and it will gel. Stir it up and you are ready to do your wash!