How to straighten your hair overnight. Or at least keep it straight and stopping it from curling back up overnight. As a girl with curly hair this always happens to me and i really do not want to use a straightner again to cause more hair damage. So what I do is try to preserve the style as long as possible before I have to wash it again. I take break in between and I don't always wear it straight. You can use a silk bonnet but if you don't want to then use a silk pillow case which is what i used since i just did not more stuff on my hair. It is pretty comfortable to sleep in. Please let me know if you have any questions or if you want more details on this method