If you already have mice in your home, you have several physical control options to choose from. There are several types of traps that can be used to kill rats and mice. Snap traps and electronic traps are easy to use and very effective when set properly. They generally kill rats and mice instantly. Live traps have trap doors that are triggered when rats or mice walk over them.
Most traps without covers should be set at right angles to the wall, with the baited end of the trap closest to the wall. Some traps (like electronic traps and covered snap traps) should be set with the entrance parallel and flush against the wall. Set 1 trap per meter along walls, or 5 to 10 traps per visible mouse hole.