Your scalp accumulates buildup the way your face does, just slower
Dead skin cells shed from your scalp every day. On most people, regular shampooing removes enough of them. But add dry shampoo, styling products, hard water mineral deposits, or an overactive sebaceous gland, and that shedding cycle stalls. The result is a layer of buildup that sits on the scalp, clogs follicle openings, and creates the conditions for itchiness, flaking, and hair that looks greasy two hours after washing.
