Irm 28 & I’ve had dandruff as long as I can remember. This past year its gotten worse. Head & Shoulders no longer works. I’ve tried mayo, which just made my hair extra oily & smelly. Tea Tree oil did nothing. Apple Cider Vinegar has done nothing. My hair is healthy. It’s only my scalp that is extremely dry & flaky. Even when my hair is towel dried after a shower the flakes are visible. I’m to the point I don’t do my hair. If I straighten it, it last a few hours & the flakes are out of control. If I put gel, moose or hairspray in my hair its worse the next day. I literally wash my hair & it goes up on top of my head. I need help…