My sister is in med school. She told me to used Head and Shoulders dandruff shampoo as a body wash after rolling because it kills ringworm. I usually wash up with that real quick then use regular old soap. If you buy the generic version its only like $1.50 a bottle and it lasts a long damn time. As far as anecdotal evidence goes, I watched a patch of mild ringworm I had on my hip for a long time go away in a couple of washes.