Thanks everyone.
It should feel warm, then you know it is working.
I did notice that the one I moved was warm and wondered about that, but now I will check all three of them when I get home to make sure they're warm and working.
No pee biscuits- that sounds not ok to me.
I had wondered about that too, Barbara, but when the vet described how it would be mixed in with the diarrhea, I thought that made sense and left it at that. I do think your idea of how he's now feeling more comfortable and is communicating to Peanut. She was in her little carpet condom at the time, and he was far across the room from her, but it still makes sense.
Do you know if he has been drinking a lot?
I didn't think he was drinking enough, but when I mentioned that to the vet, he said that could be because I was basing that on what Tubby was drinking, and since Tubby had his kidney problems and drank more than the normal cat, I could be basing my assumptions on faulty information. I have seen him drink out of the 3 bowls that are spread around - and out of the toilet. I was trying to discourage that by leaving the lids down, but Terry left one up and I thought if that's the way he wants to drink, well....at least he's drinking!
First off.........don't panic! 1 spray does not a bad cat make.
I know, I know, I'm trying not to, but I guess I've already fallen for that lovable little orange mug and I don't want anything to be wrong with him, or for Terry to not like him because of a problem like this. The vet's office suggested confining him beforehand also, so I've already called Terry and told him to put him in the little bathroom (no litterbox) with the toilet seat open (drink away Jacky boy!) so hopefully they'll get a good sample. I do know that when Tubby had a UTI his urine was quite bloody, but it could be that Jack's isn't quite so serious yet?

Lori, thanks for the tips on what to clean it with. Can these products both be bought at a pet store or hardware store? Looks like I'll be making another stop tonight too.

Thank you all for your help and suggestions. Everything was so....don't know the word for it, but everything was so smooth and placid(?) with T & P for soooo many years. Now the house has been in an upheaval for the last month and I just want everything to be peaceful and calm like it was.....and soon, my nerves are starting to wear thin....