The absolute easiest way to control it is a damp washcloth. Wring out a HOT washcloth to almost dry & scrub him down. Hot because a cat's temp is slightly higher than a person. You don't want kitty to get cold, wet & soggy, just start getting him clean. And with just a damp cloth scrub just a small area at a time. You may even consider starting with a clean cat & giving him a full bath - just depends if he has ever been bathed & will accept it. Most cats accept a washcloth just like they accept a mom cat washing them up.