[header] How to smooth frizzy hair [title] Wash with a moisturizing shampoo. [step] Frizz is often caused by dryness, so it's important to restore moisture to your hair in the shower. Always use a sulfate-free shampoo. 
Sulfates are detergents that are great at cleaning hair, but can also strip your hair of the natural moisture it needs to remain frizz-free. If your hair is dry, sulfate in your shampoo may be the culprit.