At my rental properties, I control mice by exterminating them before they come inside. I place these bait stations outside near the foundation and load each of the vertical tubes with several poison bait blocks on a rod. A six-pack of JT Eaton 902 Top Loader Bait Stations costs $68 at DoMyOwnPestControl.com. You can also zip-tie them to a roof rafter or to the top of a fence to get mice that travel those routes. They’ve dramatically decreased my mouse issues.