Hmm, have you tried cat-proofing things? I know, hard to do with cats..
You could get some kind of motion sensor that makes a loud noise and place them wherever you don't want him..as well as new, fun things every day. I know you said he has lots of toys, but if you have a spare room, try making it a fun area for him.
With colors like blue and green, which I've heard cats can see alot stronger than some other colors, and things for him to climb and shred, like real branches.
Also, getting a bunch of cat grass couldn't hurt, they love it and it's good for them.
May I ask though, why did you do the water thing? Funny though.. But a cat isn't going to understand that he got wet because he broke your things earlier... no offense meant at all.