You will see a lot of reccomendations for vinegar and it works. Smells like pee and vinegar at first, but when it dries the smell is gone. Might have to do it twice. But also I must recommend a product called Out. I don't know what it is or how it works, but it was $3.50 for a big bottle at Wal Mart. It smells like baby power (yum) and it works very well, I use it as followup after the vinegar process. Try it! :)
This happened over 10 years ago. My cat (male, unneutered) had only been gone a year when we got a new one, and I had used an enzymatic cleaner on our carpet where he and another cat had a "who can pee here last" contest :) The smell was completely gone, apparently, to our new cat, and we had no problems. I'd think that after three years, and because you used vinegar (which cats hate the smell of anyway) you wouldn't have any problems. I used to use vinegar just to keep the cats away from my windowsills, and it worked. I'd just watch the new cat to see if it starts sniffing around where the other cat had gone, and if it does, watch it's reaction. Sorry I can't give you anthing more definitive.
Use little baby powder and baking soda put it on the carpet and it will get rid of the smell.
if the kitty pees on these places try sprinkling some cayenne pepper or a citrus air freshener on them. the smell will discourage her/him from doing it again
I have just moved to a house and found out that cats have been under my house useing it as a litter box... How can I get rid of the smell as well as repell them to stay away.
JUST IN CASE, I HAVE TWO BEAUTIFUL KITTENS....
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