When your straightening curly hair, I recommend that you buy a good heat protectant that works for your hair. Personally, I use John Freida Frizz-Ease Thermal Protection Serum. You dont want to use too much, or your hair wont be "flowy" and it will look greased down. You should wash your hair the night before because if your looking foward to doing your hair in the morning it needs to be dry. Never EVER flatten hair when its wet wait until its all dry. You can damage it, and you are prone get alot of split ends if you decide to do it while its wet. That leads to another thing, make sure you coat your ends with the heat protectant serum or spray as well.