Anyone use Lumenoks or Easton Tracers? I tried my own but they are unreliable.

i just bought lumenoks this year, that work pretty good target practicing cant wait to use them this season. at 1st one of them didnt work so i called the store and they said to sand the top of my arrow where they make contact and it worked

I suppose if you use an arrow squaring device that would eliminate that too. I am not sure which ones I am going to try.