Fall is here, and stink bugs are making their annual appearance around windows, doors, and sunny exterior walls. You might spot one crawling across the living room ceiling or find several gathered near a window that gets afternoon sun. They aren’t there by accident. As temperatures begin to drop, stink bugs look for sheltered places to spend the colder months, and your home offers plenty of inviting hiding spots.
Why stink bugs are trying to get inside
During the warmer months, stink bugs spend much of their time outdoors. But as the days get shorter and temperatures cool, they begin searching for protected places to overwinter. Small gaps around windows, doors, siding, and vents can let them into your home.
Stink bugs are often most noticeable in September and October, when they gather on buildings and start looking for a place to settle in. Once inside, they may hide in attics, wall spaces, or other undisturbed areas until warmer weather returns.
Finding a few indoors doesn’t necessarily mean they’re reproducing in your house. The ones you see are typically looking for shelter rather than food or a place to raise their young.
What to do when you find one indoors
Your first instinct might be to grab a tissue and squish it, but that’s one approach you’ll probably regret. Stink bugs release a strong odor when disturbed or crushed, which is how they earned their name.
Instead, gently trap the bug in a container and release it outside, or use a vacuum to remove it. If you vacuum up several, empty the contents promptly so the odor doesn’t linger in the machine.
Stink bugs generally don’t bite or sting people, and they aren’t known for damaging a home’s structure. The main problem is having unwanted bugs appearing in your living space throughout the colder months.
How to keep stink bugs from moving in
The easiest time to deal with stink bugs is before they find their way indoors. Walk around your home and look for gaps around window frames, exterior doors, utility pipes, and other openings. Seal small cracks with caulk, replace worn weatherstripping, and repair damaged window screens.
Also check attic vents and other openings that may need properly fitted screening. You want to block insects without interfering with the ventilation your home needs.
For more ways to keep them out, see our guide on how to keep stink bugs out of your home.
What about natural stink bug deterrents?
You may have heard of using peppermint oil, neem oil, or homemade sprays to keep stink bugs away. While some people try these around entry points, they aren’t a substitute for sealing the gaps that let bugs indoors in the first place.
If stink bugs have already entered your home, focus on removing the ones you find and checking nearby windows, doors, and vents for possible entry points. That approach is more practical than repeatedly spraying an area while leaving the opening unsealed.
An unwelcome sign of fall
Stink bugs showing up around the house can be frustrating, especially when you find one in a room you thought was bug-free. But their search for winter shelter is a seasonal behavior, not necessarily a sign that something is wrong with your home.
A little time spent sealing gaps now can help keep more of them outside, where they belong.
