Thanks to natural growth patterns or a cowlick, many people struggle with a stubborn spot that parts or splits down the back of their hair. Luckily, the fix is relatively easy. Pull up that section of the hair and apply heat, either using a flat brush and hair dryer or flat iron, focusing on the roots. Let the hair cool for a few seconds, then lightly tease underneath and brush it down until it looks smooth and the back part is gone. Spray some hairspray to keep your hair in place.