Every fall here in West Michigan we get a guest on the sides of our homes and businesses, brown marmorated stink bugs! As the days get cooler, they love the warmth they can get particularly on the sunny side walls, and from there, they try to find their way inside...
As Wikipedia tells us:
"The brown marmorated stink bug is more likely to invade homes in the fall than others in the family.The bug survives the winter as an adult by entering houses and structures when autumn evenings become colder, often in the thousands. In one home more than 26,000 stinkbugs were found overwintering"
To deal with them
If you aren't comfortable with this, give us a call, and we can help!