house misery

There is a dead mouse somewhere in my house.

I thought it was in the bathroom. Anywhere a pipe passes through a wall or floor makes a mouse-road, and I don't want to know what is hidden behind the skirting around the tub. Also my walls and floor don't meet properly, and part of the floor is bare plywood, so there are lots of spots a mouse corpse could be unfindable. But then the smell showed up in my bedroom too, which made going to sleep miserable. And today, as I was wondering why mice would be dying all over my house at the same time, I realized that the smell got refreshed every time the furnace came on.

Dead mouse in the heat vent, I guess.