Next, you can make sure to sleep with your hair down, instead of up in a tight ponytail. In addition, you should replace your tight bands with a soft one that isn’t going to roughly pull at night. ___5___. Dry oils and texturizing mousses ( 摩丝 ) are some of the best ways to ensure you don’t wake up looking like a lion while protecting your precious hair from damage. Now that you know how bad sleeping with wet hair is, make sure you’re not making these hairstyle mistakes.