Just read your post on psuedomonus, I have an 8 yr old that has been dianosed with this same Bacteria, I have almost same route as you with the Antibiotics , he is not any better. His symtoms are the same as your cat. My Vet now wants me to take him to a specialist to have a scope done of his nose, I think that is a bit extreme just yet. I don't know what else to try. I was wondering how you made out with the Iodine or the cs treatments. If they worked could you tell me where I could get some info on them