I was taught some guns require no lube-ing. I clean internal parts with light oil. IF you can see your finger print on an oiled surface, you have WAY TOO much oil. Just a wet or clean look, IF you must lube. If in doubt contact the manufacturer or the owners manual, first. IMHO, Glocks run better if kept free of lube. Sigs won't function with too much lube or no lube. Weird. My friend got a Sig 220. Couldn't wait to shoot it. He cleaned it before shooting. New gun, would not feed a new round. We looked at the owners manual which said to lube only in specified locations. Re-cleaned and lubed as per manual, it worked perfect. My pal was happy. This is just what I have had experience with. Every gun is different. Hope this kinda helps. BHK