Tips to Prevent Your Hair from Getting Greasy in Summer 

2. Switch to a sulfate-free formula

Selecting the right shampoo is a key step to treating oily scalp during the summer. Switch your regular shampoo to a sulfate-free formula. Sulfate-free shampoos remove oil and dirt from the hair. It gently cleanses your scalp of excess grease, leaving behind moisture, and essential oils necessary to maintain the strength of your hair. The sulfate-free shampoo will not dry out your hair.