They tend to get in up top. I actually sprayed the facia and the eaves/vents this year, and they didn't show up lol. I also wonder if they have been getting in at the ridge vent, because if they do, they are essentially in the house as I have no attic.
One good indicator is none have come in through the chimney. Usually when I open the door on the wood stove insert there are bunches in there, dead and alive. Opened it the other day and not a one.