My daughter is about to do her first competition and I was told to glue the crystals on with E-6000.
Any help is appreciated.
This can be particularly bad when a skater loses them on the ice. However, there are some glues that are better than others. If you really want to use a glue, try it out first. Yank on the rhinestone really hard to make sure it doesn't come off. But it's usually not any easier to glue rhinestones on than to clamp or sew them.