x2...minus the exhaust fan, but only because we really just don't have any way to do it...if we could, we would. When it was still warm, we would leave the balcony door open and that completely eliminated any smell. Sometimes we put the rats outside for the day. The best spray/auto smelly treatment we have found is the plug in scented oil fans. They don't overpower the room, they take the edge off the stench, and they are cheaper to use than many of the other alternatives. Pelleted bedding, particularly equine fresh, helped a lot also, but creates more dust.