House stinks of cat ****! What's happening?

[Munter]

Given I no longer have a cat. And that the cat flap "panel" has been replaced with the original pane of glass. I know no cats are getting in my house.

Still the house stinks of cat piss/spray on occasion. Because the local cats have decided the front door is the ideal place to mark their territory. I think it's an organised conspiracy. They are smarter than we think you know.

So look out for gangs of cats, carrying pens, paper, laptops and generally organising against you.

(Or it could just be a cat pissing outside near an opening into your home. Windows, doors, ventilation blocks etc. Probably somewhere that they can smell your cats sent getting out...)