The answer to 'how did mouse get in my house' is that mice can enter homes through very small openings, often as small as a dime. Mice are excellent climbers and can squeeze through cracks, gaps, and holes to find food, water, and shelter inside your home. Common entry points include gaps around pipes, vents, windows, doors, and small holes in the foundation or exterior walls.
Mice are persistent pests that can quickly multiply and cause significant damage if they gain access to your home. They may chew on wires, insulation, furniture, and even contaminate food. Signs of a mouse problem include droppings, gnaw marks, and hearing noises like scurrying or squeaking at night.