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While most homeowners expect a quiet day, encountering unwanted insects can be unsettling. Among the many critters that find their way into homes, spider crickets—scientifically known as Rhaphidophoridae—are a common basement visitor.
These insects, also called cave crickets, camel crickets, sprickets, or toilet crickets in Japan, thrive in cool, dark, and moist environments. Naturally, they are found in caves, beneath logs, and around damp leaves and stones. A basement that lacks proper ventilation, retains moisture, or is surrounded by wet debris provides an ideal habitat, attracting spider crickets from outside.
Unlike other nighttime insects, spider crickets do not chirp, so the first sign of an infestation is often dark fecal smears on walls and floors, especially near baseboards. Seeing the insects themselves—usually in groups—is a clear indicator that they have entered your living space.
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Spider crickets pose no health risk; they do not bite, sting, or carry diseases. However, they can chew through fabrics—such as curtains, upholstery, and bedding—causing damage over time. The good news is that they are easy to control using non‑chemical methods.
Sticky traps, such as Trapper Max, work well for capturing spider crickets. Place the traps along walls, near vents, and in areas where you’ve observed activity. To attract the insects, put a small piece of moldy bread or a shallow bowl of soapy water in the center of the trap; the scent of moisture lures them in.
Prevent re‑entry by sealing all potential entry points. Inspect garage doors, windows, and vents for gaps or missing weather stripping and replace or repair them. Install screens on vents, keep garage doors closed during hot, dry periods, and avoid leaving doors open unnecessarily.
Reducing moisture is key. Clear outdoor clutter such as fallen leaves or firewood from around the foundation, use a dehumidifier in the basement, and repair any leaks. By combining these measures, you can eliminate existing spider crickets and deter new ones from establishing a home in your basement.
