Mice can cause damage in the home through their chewing, tunneling in insulation, and by spoiling food. It is estimated that a mouse contaminates 10x the food that they actually consume. Rodents are one of the leading causes of electrical fires.
Some of the signs of mice in your home include dark droppings measuring about a quarter of an inch; footprints and tail marks on dusty surfaces; wet and dry urine stains; visible gnawing on doors, ledges, and walls; and the sounds of rustling and squeaks in walls. Don't let the signs go left unattended, otherwise additional mice damage with occur.
Mice also have a characteristic musky odor that can be characterized as a nuisance or problem.
Signs of mouse activity are:
Droppings - Especially near shelter, feeding areas and runways. Mice droppings are easy to spot on window ledges, kitchen counters, under furniture cushins, drawers, or under the sink.
Tracks - Foot and tail marks in dusty areas.
Runways - Tunneling in attic insulation (looks like Swiss Cheese)
Sounds - Gnawing, light running, and squeaking in ceilings.
Rub marks - Along walls, entrances and frequently used areas.
Gnawing - Chew marks on structures or food items.
Nests - Consisting of fine shredded materials.