I have quite a few un-neutered cats in this neighbourhood and it is their time to go hunting out the females, I discover my doorstep reeks of cat urine and its not my two and also the carport, I suspect my ginger friend and Buddy the grey cat at the back, but then it could be any cat really, it sure pongs, any home remedys for cleaning it up , so that they won't keep coming back, would be much appreciated.