the manual directs users to not disassemble beyond field stripping, and most of us here feel an annual ( aT least) detail strip of slide is prudent so there is that. I am pretty lax on maintenance- field stripHere's a novel idea (I know it's anathema to a lot of the sharpshooters around here), Try reading and following the cleaning and maintenance instruction provided in the operating manual that Glock ships with every pistol. (just my 2 cents)
every 500 rounds for a sub 5 minute cleaning, and once a year tear down the slide. No issues in about 30 years and tens of thousands of rounds. White glove ins clean is not needed, and you should be able to trust the gun to work somewhat dirty.