Thank you for the information gentlemen. I couldn't find anything online other than CO's used commercially. I'm well aware of it's dangers. As far as dead mice in the walls, I don't know how to avoid that with any kind of fumigation. My wife's shop is where she does art glass work. Most kinds of fumigation will leave a film on the glass which will screw it up when fired in a kiln. I got curious about CO from something I read.
It looks like we'll have to keep trapping.
