Hi, my poor daughter has suffered with scalp dermatitis/psoriasis for years but she also has very greasy hair. She has tried dozens of different shampoos but nothing has helped. Can anyone suggest any shampoos/conditioners that can tackle both problems please? She is currently washing her hair every 1-2 days which I know isn't helping the grease problem but she refuses to go to work with greasy hair as it's very noticeable.