Hi, I have Excema/Dermatitis on my scalp (not sure which honestly) and sometimes it's flakier than others. I was wondering if someone had a suggestion for a shampoo or a once in a while deep cleanse that has some grit to it. I need something that would loosen the dry skin while not moisturizing the locks to the point of them coming out. It's not usually a problem because when I get a lot of sun, the excema clears up. Thanks in advance!