Rifle: Clean the chamber, run a pull through cleaner down the bore, clean fouling off bolt face and lifter, lightly lube lifter with ballistol before each match. After about 5 or 6 matches I take it completely down, clean everything, inspect each part, lube everything and do that before a big match.
Pistols: Do a quick clean like on the rifle after about every 4 matches or practice sessions, complete tear down, inspection and cleaning before a big match or if the pistol starts to feel sluggish in function.
Shotgun: Lube lugs and cocking pieces about every 3 or 4 matches, clean bore before big match, complete tear down every 6 months, check stock tightness (SKB) every 3 months.