Don't know a whole lot about it, but was at the Arnold Classic last year with a buddy who competes. We went by the pro tan both and the "owner", "designer" or who ever he was had some good ideas about how it should be used. But he said at the end of each day for the first 2-3 days of application that you should shower and try and let yourself air dry. They also had some kind of scrub to exfoliate the skin before application of tanner so it stayed or comes out better. Like I said, I've never used it, just listened to what the guy at the both had to say.