...not to get oil in the firing pin channel! Iwas RO'ing a pistol match 2 weeks ago, right before vacation, when the following happened. A first-timer, using his G21, started having misfires, more than a couple, with Win. white box fact ammo. After match, two of us started quizzing him; this led to a look at his firing pin area. Low and behold, it was WAY filthier than we'd ever seen-it would have taken 10, 15, 20 thousand (?) rds. of normal use to get it that dirty! Turns out that due to not reading the instructions, or otherwise having a clue, he had lubed HECK outta the gun after each of his half dozen or so range visits! We showed him how to do this part of takedown/assembly as well as cleaning; he seemed to want to just take pistol to gunshop for $20 ultrasound job instead. Said he wasn't "mechanically inclined" enough to do gun maint. Man, I had to bite my tongue to keep from saying something about how a monkey with a dull toothpick could fix almost anything on a Glock! No offense to Glock armorers intended, I said ALMOST--there are ways for people to mess up equipment only a true Glocksmith could diagnose and repair. OK, I'm done, just keep the oil offa yer firing pins folks!!