I do a surface wipe of the slide and clean out the fuzz once a week. I use a very light oil like Remington Rem Oil. The most vulnerable part of a self loading firearm is the magazine and thus it deserves the most attention. I wipe them inside and out, wipe the springs and lightly wipe the follower using Rem Oil. I also inspect the feed lips for distortion (former and current AR15 owners know that the original magazines were trash).
I also blow out lint from the hammer region using canned air.
I'm thinking of knocking out the firing pin retaining roll pin to degunk that too.
Everyone is going to have an opinion. This one is mine.