If you are having difficulty locating his "trouble spots" you mind want to consider getting a StinkFinder ultraviolet light. I got one from PetSmart a couple of years ago and it has helped me find the places where Emily likes to go.

The other thing I use is the WoolLite brand of Pet Stain remover (available in Walmart or your local grocer). Of all the products I have tried over the years this one seems to be the most effective.

Somehow I doubt your conversation with him about the baby was what upset him. It is likely due to the other kitties.

Good luck !!