I wax my bow string every other time I shoot. The newer bows should have sealed bearings in the cam and idler wheel so they don't need to be lubricated. Once a year I remove the axles and wipe everything really good unless I hunt in dusty or wet conditions then I do it more often. Other than that just check things over and look for normal wear and you should be good.
Pro Staff Shooter for: JBI/U-Slide