aaah, sorry for butting in, but please don't declaw, it's incredibly painful for them and can lead to health problems later on (cutting off the toes can screw up how they walk and cause arthritis and assorted muscle/joint issues). plus, if he does manage to sneak outside, which many of my indoor cats have managed to do over the years, he'll be totally defenseless if something tries to eat him. :(

totally with you on the spray gun, though. usually works like a charm if you give him a little spritz just as he jumps up.