Mice can be found in vehicles, homes, garages, sheds, and woodpiles. The most common signs [1] of mice are "droppings" or poop, which appear as very small (approximately 1/8th of an inch) dark, rod-shaped particles. Occasionally "gnaw" marks can be seen as slight discoloration in wood. In areas where they can access food, it may show up as ripped/torn wrappers or food particles from otherwise sealed bags. If you observe any of these signs, begin cleaning protocol following the steps above or review here. [2]