Your scalp deserves a reset, too, and this pre-shampoo rinse makes it easy. The liquid formula works kind of like a peel for your head, using alpha and beta hydroxy acids, apple cider vinegar, witch hazel, rosemary, sage, and peppermint to help exfoliate buildup, flakes, and excess oil without harsh scrubbing. Just part dry hair, apply it with the nozzle, let it sit for five minutes, then wash.