“You wash your hair to remove dirt and build-up from your hair and scalp itself,” Dr. Rodney explains. How often to wash your hairThis is where your hair type comes into play. Experts break it down by hair type and offer cleanser recommendations. But if you find that it’s getting dried out, Dr. Rodney suggests just rinsing out the sweat between actual hair wash days. “You really have to find the right balance for your hairstyle and hair type,” Dr. Rodney says.