Well, maybe my inability to catch them all with a regular mousetrap had more to do with my trapping ability........
One of the things I understand happens to the mice that are poisoned is that they get very thirsty, and so leave the garage to search for water. Hopefully a good portion of them would die outside.
I tried the ultrasonic plug-in mice repellers. I think they liked to dance to them. Or they got used to it somehow. Didn't work.
Ken300D