Mice find their way into home looking for 2 things; warmth and food. Cold weather often drives them indoors to find shelter, and our homes look that much more enticing if they can find a food source. They gen in through cracks and anywhere there’s a gap: around vents, wires, pipes, windows and doors. Mice can chew through electrical wires and cause an electrical fire. They can destroy rigid foam and fiberglass batt insulation. They can eat away at any wood in the house including furniture, trim, cabinets, doors, even the wood in house structure. If you have got mice, you can try setting out traps. I don’t recommend using poison to get rid of them. Poisons are not always effective, and you don’t want to put the family pet at risk; pets can eat the poison or the poisoned mouse dies it’s often somewhere inaccessible, like behind a wall. To stop mice from getting inside, check annually for cracks and seal them. Always get an experienced exterminator to address the problem. They can find where the mice are coming in and block their entry with mesh wiring, wood, and/or spray foam insulation. Other solutions include weather strapping around the doors–this also increases energy efficiency–chimney caps on chimneys, keeping compost far away from the house, and moving firewood and mulch away from the house exterior. A sealed home is the only way to stop the problem. It’s the most effective and humane solution.