As for the scalp try to exfoliate with some baking soda and apple cider vinegar. I do this once in a while to remove the buildup in my scalp and dreads. You may think your hair is clean but you would be surprised at all if the dirt that comes out when you clarify your scalp with baking soda and apple cider vinegar. Then wash with a mild, preferably fragrance free shampoo (Dove or Castille Soap)