There is a guy on another forum who used bait, the rat died on top of his black tank and the smell lingered for years. They found it a few years later when he was upgrading his plumbing bay.
One year I used the bait boxes and when I was taking the 5er out in the spring I saw the clear section of the tail light was green. Yeah bait stash.
I used the peppermint bags this year for the 1st time along the walls of the garage. I also set 6 victor spring traps just in case. Caught 2, 1 being right next to the peppermint bag :W
Short of owning a cat I don't know of any solution that is 100% effective for controlling mice.
2015 Tiffin Phaeton Cummins ISL, Allison 3000, 45K GCWR
10KW Onan, Magnum Pure Sine Wave Inverter
2015 GMC Canyon Toad
Previous camping rig
06 Ram 3500 CC LB Laramie 4x4 Dually 5.9 Cummins Smarty Jr 48RE Jacobs brake
06 Grand Junction 15500 GVWR 3200 pin