About every week [Or whenever I clip my fingernails] I break my carry gun down. And clean off all the fuzz with a toothbrush. Both inside and out. And don't laugh! Fingernails make a great reminder. Then I lube it and reassemble. Over the years I have caught a few problems. I've found rust. Sites pushed to the side. And all manor of dirt and crap in my carry guns. If you want to have a little fun at the next BBQ. Just ask a buddy you know that carries to see his gun. Make it safe and look it over. You may both be surprised at what you find.