I would recommend CO washing less, if you can get away with it. Although conditioner can be soothing to your scalp, like lotion can be for dry hands...you don't leave conditioner in the scalp. Conditioner should be rinsed off thoroughly to avoid build up issues. Many people leave some conditioner in their hair, but it should really only be on the length of the hair, not the scalp.
If you CO wash your hair less, it gives your natural oils a chance to start moisturizing your scalp.