Another method would be with the use of bobby pins. For this, you need to get your hair completely air dried. Then, brush it backwards so that there is no parting. Start applying bobby pins to your hair from the sides first and then pin the remaining back-hair on either side of your head, using more bobby pins. Wrap something like a towel, cap, hat, or a scarf on it and sleep on it for at least 6 to 8 hours. When you wake up, don't be surprised looking at your lovely straight hair!