A couple of weeks ago I took my G27 to the range. It has probably had around 1000 rounds through it. I stepped up to bat and much to my surprise it went "click" on the first round. Then I had several more failures but was eventually able to fire all 50 rounds. 180 gr Federal Champion. The failures were light strikes. Took it home, cleaned it, bought some different ammo (165 gr Win white box), and tried it again last week. "Click". Several failures again with both kinds of ammo. I showed it to the RSO and he took the slide and shot some CLP into the hole in the slide just behind the breech face. A couple of more failures initially but then shot 30 rounds with no failures. Took it home, cleaned it as normal, then shot some CLP in myself. It appears I had build-up in the firing pin channel. My question is whether or not I have done enough? I clean and oil all my semi-autos (Glock or not) the way Glock recommends in the manual and have not had any problems in the past. Should the firing pin and spring be removed for a more thorough cleaning of the channel (Glock doesn't mention or recommend) or shoot some CLP in the slide whenever cleaning?