what type of method do you use to prevent the trace of fingerprint on the external side of a pack? when you work at home during the packaging it's easy to avoid this problem, you can easily use gloves and wash everything with alcool, paying attention to hairs. But when you bring the pack at the post office or at a box which is the best method? Using gloves outside it's not a good idea and the method of the dried superglue on finghers I think it could also create some problems. Any idea?