Faith, I try to keep it in for at least 10 minutes and the goal is 20. SO I might do 5-6 10 minutes, or 3 20's, it just depends. Trapper, actually I've had a little dairy in there, but I bet that's what it is. I just did my second round as I took a nap after my sitz bath and this is a lot foamier than the first go around today. VERY interesting.