Mice can be very tricky to deter as they can access our homes from all angles. They are incredible climbers and can fit through openings as small as a pencil eraser. We use pest control applications when getting control and treating mice. This requires a very strong commercial grade rodenticide. Some things that homeowners can do is to seal up any small cracks and openings around their home ex. gaps around A/C units and Furnace exhausts. Keeping food properly stored will also prevent attracting mice.