Your post sounds like where I was just a few short years ago. Specs got pee wars started and I felt like I was living in a giant litter box. I tried everything you've mentioned w/the same results. They even peed on the Feliway plugins. I actually bawled in my vet's office one day and that's when he told me about Clomicalm. I'm sure you know about it b/c you're a vet tech but I was ready to try anything. If he would've said that I had to stand on my head and stack beebees I would've done it. He told me that it might take several weeks to begin working but I saw immediate results. The trick is not to miss a dose. I get their blood work done each year and so far, no problems, no side effects either. They get such a small dose, 5 mg. at bedtime. Specs gets it twice a day; he's a Maine Coon, a big boy, and the troublemaker but I can assure you that he suffers no side effects whatsoever, no drowsiness, no personality change, nothing but no inappropriate peeing.

Before Clomicalm Specs sprayed my dining room server so many times in the same spot that one of the doors actually came off the hinges and it warped the wood. That's what sent me to my vet w/the crying. He told me that it was made for dogs w/separation anxiety and/or aggression but that it was being used successfully on cats. Yes, I was reluctant to try a drug but I was not willing to have my entire home ruined. I'm happy to say that my house is now a "pee free zone". They use the litter boxes w/no problems whatsoever. Perhaps talk to your vet about Clomicalm and see what s/he says. It's been a godsend for me.

Good luck. I truly know how upsetting it is and I can so relate to your anxiety. Keep us posted.