Wash twice, scrubbing the scalp well, then rinse.  Use only a light conditioner and rinse it out. Afterwards, use a baking soda rinse made with 1 tbs baking soda in 2 cups of water. Pour it over your hair, let it sit for a couple of minutes, then rinse well.  Follow this with an apple cider vinegar rinse, using 1 tbs ACV in 2 cups water to seal the cuticle and condition the hair.
Benefits of Apple Cider Vingear