10 Major Mistakes You're Making When You Try to Straighten Curls

If your flat iron only switches on and off, it's time to invest in a new one. "You want to use one with a variation of heat because everyone's hair texture is different," Johnny said.

Most of the time, you don't need to work with your tool on the highest 450-degree setting. If you touch up daily, turn the dial down to help minimize heat damage.