Use the dryer and straightener occasionally and sparingly. Make sure your hair is conditioned, dry and you should also coat it with heat protective product before you use a straightening iron. Make certain that the iron is not too hot and apply it to hair in small portions. It is better to move the iron gently down the hair and then leave it slowly. If the outcome is below your satisfaction level, you can follow the process all over again. But never ever stop the iron on any part of the hair.