When I worked for Terminix, I learned to use a "Slim Jim" piece about 1/4- to 1/2-inch long on mouse traps. Mice seem to love it, it is hard enough to stay on the trap lever, it can't be licked off and, most importantly to many, it has enough preservatives in it that it will seldomly, if ever, turn moldy - unlike peanut butter or raisins.
If you don't know where the mice are coming in, spread a small amount of baby powder around each possible entry point and watch for paw prints. The powder is easy to vacuum up when you locate the entry points, and it smells good too
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The small, edible packets of rodenticide and the pellets in boxes do work, but the problem is the mice often dehydrate and die between wall layers on in places where you can't find them or get them for removal. This smells bad and is also unhealthy since it draws scavengers
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I hope this of help to you with your "visitors."
Larry