Lens and mirrors
Clean with the supplied cloth and lens fluid; never dry-wipe a lens. A dirty lens loses power and can crack.
Belts and rails
Check belt tension and wipe the rails. Loose belts show up as wobbly edges on a straight cut.
Exhaust
Empty the tray, clean the fan guard and check the hose for cracks. Smoke residue builds up fast on the optics.
Long absences
Cover the machine, unplug it and leave the lens cap on.