Mine get cleaned after each use. Overkill for sure but knock on wood I have 0 mag related issues. The Glock followers can wear with high use. They still feed fine but they won't lock the slide open after the last round. The followers are cheap and easy to replace. I have yet to replace a single Glock mag spring. For lube go easy. I have a silicone impregnated towel I wipe the parts with and that's it. You do not want oil inside the mag.