Conditioner is not (and never will be) a substitute for shampoo. You want to cleanse the scalp with a clarifying product every seven to 10 days. "Everyone needs to cleanse their scalp and hair for proper hygiene," said Willhite. "Cleansing with shampoo will reduce any excess buildup of oil that your scalp produces, or the buildup of hair products." For your weekly wash, use a sulphate-free shampoo or another natural alternative, like an apple cider vinegar rinse.