Spray-on for me - specifically, RCBS Case Slick. I just processed about 1,200 .223 and .308 cases through a Hornady LnL with case feeder (FL resize, trim, neck expand) by dropping about 30 cases at a time into a medium-sized Akro bin, spritzing the lube across the cases 3 or 4 times, shake them around, then dump into case feeder. I do that about 6 times, for about 200 cases in the feeder at a clip. The shaking in the bin, combined with the tumbling in the case feeder, distributes the lube nicely across the cases, and because of the randomness of the cases in the bin, some get their necks lubed, too - so the expander ball doesn't drag.
Didn't stick one case.