Having used it only once so far, I haven't noticed any effect on my dry scalp, but I think it's a fantastic product that does its intended purpose. I tested its suction power a couple of times (cleaned the tiles I intended to suction it to first, and it worked every time except once, which I think was only because I attached it wrong that time). That was not even a dealbreaker but a welcome space-saving bonus. Anyway, it wasn't harsh on the scalp, either.On the negative side, while using it, I sSee full review