When you sew your pointe shoes, you typically cut your ribbons shorter so you don’t have a long tail when you tie your ribbons. Unfortunately, this causes most ribbons to begin to fray, which can be a huge problem if they fray too much. So what do you do? Take a lighter (with adult supervision) and pass the edge of your ribbon through the flame a few times. Keep your fingers at a safe distance from the flame. This should melt the edge of the ribbon and create a sort of seam so your ribbon will no longer fray.
This totally works!
I’ve never tried this method, but using clear nail polish and swiping it across the tips of the ribbon works well, too!