What is a sign of silverfish and firebrat infestation?

The presence of irregularly chewed patches is indicative of a silverfish and firebrat infestation because these pests are known to feed on materials such as paper, fabrics, and other starchy substances. Their feeding habits can lead to noticeable damage in the form of irregular holes or patches, particularly in stored books, clothing, and other cellulose-based materials. This type of damage serves as a clear visual sign that these insects are present and actively feeding in the environment.

Other signs of infestation, such as visible eggs, might be relevant but are less commonly observed with silverfish and firebrats. Similarly, stains on walls and frass accumulation, which refers to insect droppings, might not specifically point to these pests since other insects can cause similar issues. Therefore, identifying irregular chewed patches is a more direct indication of silverfish and firebrat activity and allows for targeted monitoring and control efforts.