If your hair is bone dry because of the lack of humidity in the air, you may need to switch up your shampoo and conditioner. The shampoos and conditioners below are formulated for dry hair. You should condition every time you shampoo. Look for an ultra-moisturizing conditioner made especially for coarse hair. Look for conditioners that contain avocado, macadamia oil, shea butter or aloe vera. Once a month use a hot oil treatment. For extra-dry hair, use an intense moisturizing treatment every 2 weeks.