I've carried Glocks for many years now and shot each of them in matches without any failures due to the gun. I limp wristed one once when switching to off hand and the case didn't fully eject. Cleared easily, continued, and finished the stage. Prior to each match the only prep that was done was to pull the slide back and put put a drop of lube on each rail. It probably didn't need it, but I do that with every gun (shotgun or rifle) before a match.
I wipe them, you know, like with a cloth, maybe once a quarter. Completely strip them down once or twice a year depending on the amount of shooting they've seen. The last couple of years, though, its only been once a year.
I don't even clean the Glocks after every match or range session. Maybe every second or third time. That might be after roughly 500 rounds. I'll shoot between 100-200 rounds each session.