I have a 10year old male cat who has just recently started urinating in one room of our house, not neccesarily the same spot but it is the same room. I have steam cleaned, shampooed and put all kinds of sprays down that I found at the pet store and the smell won’t come out. I have a vet appt for my cat to see if it is a medical reason. I just can’t think of any reason he would start doing this. There have been no big changes in our house or lifestyle. We are only renting this house, so we can’t remove the carpet ourselves, only thing I can do is to continue to use my steam cleaner and hope that sometime the smell will come out. If anyone has any suggestions, please let me know.
ALSO, I did want to comment on your situation, first you should see a Vet to see if there is a medical reason for this change, to rule that out at least. Best of luck to you. We have also considered, as a very last resort, getting rid of our cat, but we really really do NOT want to do that, we just dont’ know what else to do at this point.