Soft bristle brush in and around the limb pockets and any other little nook or cranny that crud can get into. I just use good old water with a little Dawn dish washing detergent to wipe away any blood, mud, or grime from the cams, limbs, and riser, then wipe it dry with a microfiber cloth. I absolutely refuse to use WD40. All of the screws, bolts, clips, etc. get a dab of light machine oil during the off season and the silicone treatment during the season, before and after any hunt in the rain. The strings get cleaned and then waxed using a leather pad to rub the wax into the string. A little preventive maintenance goes a long way in increasing the longevity of your equipment.