If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. 5. A diffuser is an attachment that helps distribute/diffuse air flow with multiple air channels (fingers of a diffuser) over large surface area. If the dryer pushes air so fast that your curls are whipping around, youll create frizz instead of definition. Ready to make every day a good hair day? Cons. Turning from side to side and bringing the diffuser with you will create movement in your roots, so your curls look natural and bouncy. So there you have it how to diffuse hair. What does a diffuser do for wavy hair? 17 November 2020. You can also let your hair air dry 90% of the way to save it from the heat of your hairdryer, then just finish it off with a quick blast. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/8a\/Style-Wavy-Frizzy-Hair-Step-1.jpg\/v4-460px-Style-Wavy-Frizzy-Hair-Step-1.jpg","bigUrl":"\/images\/thumb\/8\/8a\/Style-Wavy-Frizzy-Hair-Step-1.jpg\/aid9642222-v4-728px-Style-Wavy-Frizzy-Hair-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"