Flying bugs used to be one part of warm weather I couldn’t keep outside. Gnats, flies, and other small pests would make their way into my kitchen, even when I kept the space clean.
Then I plugged a STEM Light Trap into an outlet. It looks closer to a blue nightlight than a bug trap, but behind the cover is a sticky cartridge designed to catch the insects drawn toward the light. I’ve used one since spring 2024, and flying bugs have stopped being a regular sight in my kitchen.
Blue Light Draws Bugs Toward a Hidden Trap
STEM doesn’t leave a sticky strip hanging from the ceiling or dead insects exposed on the counter.
The plug-in unit produces a soft blue UV light that attracts flying insects. Behind its opaque front cover sits a sticky cartridge where the bugs become trapped.
During my first few weeks using it, the cartridge caught moths, gnats, aphids, flies, and even a spider or two.
The cover keeps what it catches out of view.
Peel the Cartridge and Plug It In
Setup doesn’t require bait, sprays, or liquid.
Peel the paper backing from both sides of the blue cartridge, place it into the device, and plug the unit into an outlet.
The plug can rotate up to 90 degrees, which gives you more options when an outlet sits close to a counter or another object. The device takes up one outlet.
Once plugged in, it runs around the clock.
I Don’t Hear It Running
Constant operation doesn’t mean constant noise.
There’s no humming or buzzing while the trap runs, including when an insect reaches the sticky surface. The blue glow is the main sign that the device is on.
That matters in a kitchen because I don’t want another appliance making noise on the counter. I often forget the trap is there.
I Keep Another One in the Bathroom
My kitchen isn’t the only place where flying bugs show up.
I also keep a STEM trap in my bathroom, where humidity, darkness, and a cat litter box can attract unwanted visitors.
The covered design matters more there. Guests see a small blue light rather than a strip covered in trapped insects.
Check the Cartridge Behind the Cover
The bugs stay hidden, but the cartridge still needs to be checked.
STEM recommends looking at the trap every 30 days to see whether the cartridge needs replacement. In my one-bedroom apartment, mine lasted for months before I needed to change it.
That was my experience, not a fixed replacement schedule. How fast the sticky surface fills will depend on how many insects reach the trap.
Refills snap into the device once the old cartridge is removed.
It Doesn’t Use an Insecticide
The trap doesn’t spray insecticide into the kitchen. It relies on UV light to draw flying bugs toward a sticky surface.
That makes it different from the apple cider vinegar trap I can build on the counter. Both use an attractant and a physical trap, but this one stays plugged into the wall and keeps what it catches behind a cover.
Trash cans, drains, houseplants, and other areas where flying insects gather are all places where the trap can make sense.
What looks like a blue nightlight beside my kitchen counter has another job happening behind it. I don’t have to see the bugs it catches—and that’s part of why I leave it plugged in.
Would you use a plug-in light trap in your kitchen, or stick with a DIY fruit fly trap?
Leave a Reply