I trried it on. I washed my hair with my regular shampoo first, then I put the Intimo on for 15 minutes. It didn't burn or anything. Actually it didn't produce any feeling. I woke up this morning and I think the scalp is a little less irritated. But it might be the drugs. Anyway I'm gonna keep on doing this, but I don't know - should I put Intimo on my head everytime I wash it, which is at least 4 times a week, or just twice a week, like you?