1.Live or dead mice.
2.Nests or piled nesting material
3.Gnawed holes in stored foods, piled papers, and insulation
4.Finding food scraps or wrappings left behind
5.1/4 to 1/8 inch excreted droppings with pointed end or ends
6.Rodent hair
7.Runways indicated in a narrow fashion where dust and dirt has been swept clean
8.Noticeable grease marks and urine trails under black light
9.Skittering noises on hardwood or laminate floors
10.Rank odor of a large infestation