You are too late this year. You will not be able to get them until they emerge - they already hidden in you walls.
I suggest that now you use a vacuum cleaner to suck them up rather than squashing them. Since you are not seeing a lot, just suck up a 1/2 tsp of boric acid after you get the bugs.
This is not a one time problem. It will happen every year, unless you close their doors. These bugs see the heat escaping from your abode in the fall. They follow the heat and get into the walls. The heat comes from the inside, so they follow it. Either close the gaps on the outside of the structure, or spray the outside of the structure with a repellant pesticide. Spraying is not an easy DIY job since a power sprayer and a lot of gallons are required.
Since this bug will fly a few miles to find it's winter abode, you will not be able to impact their population. Closing their doors will save you money on the cost to heat your home. Since they emerge in the spring, mate, then lay eggs, they may like some of your trees. That would be boxelder, maple, scrub oak, and probably other plants. You can treat those next year if they are in your own yard. You will see larvae on the ground at the base of their selected trees in the spring.