Once a year (at one of our trimester training sessions) the armorers will take everyone’s gun into the armory and do a once-over.
These guys have told me they find and clean out from the firing mechanisms of the issued Glocks pieces of lint, water, rust, sand, powder fouling, too much oil, too little oil....the list is nearly endless.
The slobs with real issues will have a memo sent to their captain about the poor state of their duty equipment. Does it help? I don’t know because every year the scene is repeated over and over again.
Hollywood has created this belief that LEOs are Gun-savvy pistoleros who on a daily basis wreck three cars in a pursuit and then fire fifty rounds in a final gunfight...and then are back at their desk within ten minutes on the hunt for the bad guys cohorts...in reality my 29 years (and counting) has shown me that about 95% of the day is spent filling out paperwork, talking to people or driving from one place to another.
It has also proven to me that because one owns a gun, or even carries a gun as a part of their daily equipment, it doesn’t mean one cares enough about them to take care of the gun.
Stay safe.