Vacuum traps are best for handling flying insects, especially those that aren’t attracted to light. These traps use a vacuum fan that sucks in nearby pests and confines them in an internal chamber.

“Found gnats, fruit fly and unidentified flying insect in trap. Immediately ordered another,” one reviewer wrote.

When my house suddenly filled with flies two years ago, I didn’t know how to handle the problem. I made sure every screen was secure, thoroughly cleaned my house to make sure there was nothing out to ...

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