STEM Light Trap Refill Cartridges — 10-Pack Adhesive Inserts for Indoor Fruit Flies, Mosquitoes & Gnats, Insecticide-Free

STEM Light Trap Refill Cartridges are adhesive replacement inserts made to keep your STEM plug-in light trap catching mosquitoes, gnats, moths, house flies and fruit flies without insecticides.

These official STEM refills snap into the base of the STEM Light Trap to restore its soft blue-light attraction and sticky capture surface, offering an odorless, mess-free way to reduce flying insects indoors. Each pack contains ten cartridges so you can swap refills regularly for continuous performance. The refills require no sprays, chemicals, or special tools — simply insert, plug in the trap, and let the unit run quietly in living rooms, kitchens, bedrooms, or other indoor spaces.

How do these refills work with the STEM Light Trap?

Each cartridge is a pre-coated adhesive strip designed to fit the STEM trap’s insert slot. The device’s blue LED draws flying insects toward the trap and the sticky surface captures them on contact. Replacing the cartridge ensures the trap maintains its trapping efficiency.

• Snap-in cartridges sized for official STEM Light Trap models
• Blue light attracts insects; adhesive secures them without sprays
• Replace cartridges regularly for best results

What types of insects will these refills capture?

The refills are formulated for a wide range of common indoor flying pests. They are effective for small, light-attracted insects that come close to the trap’s LED. The product is intended for indoor use and works best in low-light areas where the blue light is more visible to insects.

• Targets mosquitoes, gnats, fruit flies, house flies and small moths
• Best placed in kitchens, near trash areas, or bedrooms away from direct sunlight
• Not an outdoor solution; optimized for indoor low-light conditions

Are these refills safe to use around people and pets?

STEM refills themselves contain no aerosol sprays or foggers; they rely on a mechanical light-and-adhesive method. Because there are no insecticides emitted, they avoid residues and strong odors commonly associated with chemical pest control. Always follow manufacturer instructions to position the trap where children and curious pets cannot touch the sticky surface.

• Insecticide-free design minimizes fumes and residues
• Keep out of reach of pets and children to avoid contact with adhesive
• Quiet, countertop or outlet placement preserves home comfort

How often should I replace each refill cartridge?

Replacement frequency depends on local insect activity and where the trap is placed. In moderate conditions you may swap refills every 2–4 weeks; heavy infestations or warm seasons often require more frequent changes. Inspect the adhesive surface: when it's full of trapped insects or dust, insert a fresh cartridge for continued performance.

• Typical interval: 2–4 weeks in moderate conditions
• Replace sooner if adhesive fills with insects or debris
• Ten cartridges provide multiple months of routine replacements

Who is this for: STEM Light Trap Refill Cartridges are suited for homeowners, renters, and anyone wanting a discreet, chemical-free option to reduce indoor flying pests. If you already own a STEM Light Trap or plan to use a plug-in, low-odor solution in kitchens, nurseries (placed safely), bedrooms, or common rooms, these official refills keep your device operating quietly and effectively without sprays or traps that leave residues.