The answer to 'how did mouse get in my house' is that mice can enter homes through very small openings, as small as a dime. Mice are excellent climbers and can squeeze through cracks and holes to find food, shelter, and nesting areas inside your home. Common entry points include gaps around pipes, vents, and wires, as well as cracks in the foundation, siding, or roof.
Mice are persistent pests that can cause significant damage and contamination once inside. They can chew through wires, insulation, and other materials, and their droppings can spread diseases. If you suspect a mouse infestation, it's important to take action quickly to prevent further problems.