I have quite a few cats, male and female, all of which have been spayed and neutered. The problem is that a couple of male cats still spray! Unfortuantely indoors as well. Not in the same place, one of them sprays anywhere. No matter how much I clean, spray the area with vinegar mixed with warm water (which is supposed to get rid of the smell), he still comes back and does it elsewhere. I am loosing my patience with him.Does anyone know how this can be stopped? I have a couple of other male cats that don't spray. I don't understand why some do and some don't!I have to stop it as it is becoming a major problem. Anyone with any ideas?