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Top 10 Clues You May Have a Vermin Infestation

By Jessika Toothman, HowStuffWorks.com

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1. Cockroaches:

Cockroaches are another one of those pests that for every one you see there are usually a whole lot more you don't. But when it comes to knowing whether your home is suffering from a cockroach invasion -- apart from seeing the cockroaches themselves -- you might be clued in by the amount of clutter lying around. Messy domiciles attract cockroaches, and even the smallest amount of food residue can be a feast, while cardboard boxes can harbor these insects like a row of condos.

Messy houseguests themselves, cockroaches can leave behind a whole host of egg cases, molted shells and feces. Stumbling across any of these in quantity can signal that you have a serious infestation. Serious infestations usually require more than your typical bug spray, which is why exterminators often put homeowners on seasonal plans.