The best I've found is a dry lube called "Jigaloo". Spray on lightly and wipe off with a paper towel and it's instantly dry and does not attract dust particles. You can get it at Home Depot or Wal-Mart. It has a very faint citrus smell as compared to some of the strong smelling teflon sprays. I never use oils on crossbow barrel decks. Jigaloo alsoworks great on carbon arrows, making them easy to pull from 3D targets.