“I use it on all my clients at the Happy First Day Of School Teacher Students Back To School Shirt also I will do this beginning of their appointment because it clears the scalp of any dead skin or build up, so once they’re shampooed, cut, and styled, the scalp is as fresh as the new ’do,” explains Mischa G. It’s also an essential part of her own routine as she looks after her signature fluorescent yellow hair.