I was having horrible issue with my cat a few years ago. Here's my thread, what I did ultimately worked and we've been pee free (well, other than a one off here and there, but I can handle that).
"One cat just leads to another." - Ernest Hemingway
Meowy Meowers - Angus n' Finn - 5 yrs old
Barky Barker - Skylar - 4 yrs old??