I posted this in the cat section, but got no replies...!
We just moved into a new ground floor apartment and have found that our doorway and the attached meter cupboard seem to the favoured hangout of all the local kitties. So basically it stinks of tomcat spray 
Is bleaching it all the best thing to remove the smell? Or will it just encourage them to come back and piss everywhere to make it smell nice to them again?
Are there any sprays or plants I can use to repel them or discourage them from returning?