It depends on what products you use. If you use the correct products, you can flat iron your hair damp. I do it once a month and I’m very satisfied with the results! I do my usual shampoo then use a cream [forgot the name as its not a brand] leave it for the night and wash it the day after. Then I use the oil [in the package] and flat iron it even if it’s damp. It works wonders on my hair. My hair becomes so soft, so silky that I can’t help wondering why people insist on not using straighteners on damp hair.