Yellow Jackets in house, perhaps via Fireplace
I have so many yellow jackets on my patio and the traps aren't working.
I've had problems the last two summers with yellow jackets getting in the house.
I'm thinking that they are getting in through the fireplace since it's a few feet from the patio sliding glass door, which is usually where I find them. They die after a while because it's so hot next to the glass, but the cats could get stung trying to catch them.
It usually happens late in the summer, but this year the cat brought my attention to one just last week. Last year I sealed two vents outside adjacent to the fireplace, but I can't seal them completely, since I don't know what they go to. I also put Bounce in there because someone said they don't like the smell. I don't think it works.
I sealed around the sliding glass door, but I also noticed that the siding doesn't but up against that frame and they may be entering into the walls. Is this possible from the outside?
Could they be flying down the flue in the fireplace, even though it's closed?
This year I sealed the fireplace with that window plastic wrap but I'm also looking at the fireplace as a means to vent an evaporative cooler or air conditioner due to lack of windows. See my posting under heating and cooling for that one.