it's been a year since i've physically moved my 2010 mini. unplugged everything and flipped it over to swap the ram and saw a lot of dust buildup around the rim of the bottom circle base toward the back side where the fan is. upon removing the base cover i saw quite a bit of dust buildup in the back half where the metal grate is. used compressed air to blow everything clean, though in hindsight i probably should have used a dustbuster/vacuum to suck out the dust. in any case, if you haven't looked at the bottom of your 2010 mini for over a year, now might be a good time to take a look down there. you don't want dust blocking the intake vents. likewise check the rear outtake vent for any dust buildup.