Yes, I heard the same thing about not washing it. I tried that and my hair starts getting oily after 12 hours. After one day, it just looks terrible, and I have left it for longer and it just gets worse, since I get Seborrhea dermatis if I don't wash it. It is like pouring some bacon grease on your head and walking around with it. I never had this problem before puberty, so it is a hormone problem that will probably never get resolved. Even my mother has the problem and she is in her sixties.