We are fighting a losing battle with those nasty little brown stinkbugs. Apparently they came over from Asia and are in the area to stay. During the winter months, they tend to find their way into houses and live in the walls. If there are any cracks or openings they then find their way into the house.
These things are ANNOYING. The sit on a wall or other surface and just sit there. Once in a while they will buzz around the room, crash into a wall and fall to the floor.
The really bad thing about them is that they are odiferous, an offense to the olfactory senses. In other words, they stink.
Battling these things is a pain. To deal with the immediate infestation you need to trap then one by one. However, if you aren't careful they will raise a stink.
Sucking them into the vacuum doesn't work very well. The vacuum will stink. You don't want to crush them and throw them in the trash because the trash, and possibly your hands, will stink.
We've found a couple of things that work. (1) Catch them with a bit of saran wrap or the equivalent. Roll that up into a tight ball. The Saran Wrap is pretty good at locking the scent in. (2) Get a decent wad ot toilet paper and catch them without crushing them. Ball it up and flush them down in the sewer with the rest of the stink.
For the longer term I'm going around the house checking for cracks at the baseboard, windows, light switches and any other area they can get in. By sealing that up, you will reduce the infestation inside the house. Once the summer comes and they have left the walls, it's time for Mister Caulk Gun and a lot of caulk. That will help keep them out for next year.
I have read that you don't want to use insecticides. Supposedly you will then have carpet beetles that will eat the dead bugs and then your woolen clothes. There are some traps that are supposed to work.