When you are trying to fall asleep and lying flat, you may notice that your heel is not staying down inside of the night splint. Do not worry; this seems to be a common issue among users. Various customers who have experienced this issue have provided some insight on what they have done to solve it. One user had a simple solution of merely bending your knee to allow your heal to fall back down. Now, not everyone will be comfortable sleeping in this manner. Another customer claimed they took supports from their older shoes to raise up their heel enough for it to be comfortable. This is certainly an option you can try out and considering yet another user claimed to have success with this method, it is worth a shot.