I recently "bombed" my RV with those canisters.
Obviously I only needed 1 for the inside. And since the box came with 3, I let off the other two underneath outside.
They actually came with a nice smell added to them.
It wasn't a mice issue. Instead, I think my TT was shipped with an ant problem. HUGE ants too. Not the kind that are native to my property.
Anyways, man did it work! I came home to DEAD ants everywhere. And I mean everywhere! On the roof, the counters, furniture, shower, and floor. And outside there were dead ants on the astro-turf porch too.
1 day later there were yet a few more. After a couple of days, no more dead ants when I got home and haven't seen a live one yet. I guess it only goes to show these things aren't built nearly as "tight" as a brick and mortar is. So the bomb was very intrusive and effective.
Now, having said all that...........would a mouse be comfortable nesting in an environment that was caustic to insects? And to be honest, it only took a few minutes in a small RV to clean up the mess and wipe everything down. So bombing periodically just might be a reasonable plan?