A while back some yellowjackets made a nest in the edge of the sheeting at the edge of the 1st floor roof. I ordered some seriously lethal bee/wasp poison (at a seriously lethal price) not available in NJ from a FL company that shipped it to NJ :) I mixed it with all kinds of recommended baits, jelly, chicken, hamburger..yada yada yada. They would have none of it. After watching their morning routine (this was early spring), they would wake up with the warmth of the sun around
9am crawl out from the edge of the roof onto the roof about 6 or 7 inches away and rest in the sunlight for less than a minute or 2, then fly away. Usually one at a time, one after another. It then hit me how to get'em. I liberally painted some poison on a spare roof shingle (wasn't sure how it would effect the shingle color, and it did) and laid it on the roof, flush with the edge. Sure enough, when they came out they walked right through it and rested on the deadly shingle. I watched them do this 4 mornings in a row. And then they were gone.
Now if you're bent on trying something you could paint a little poison on the entrance every other day or so (at the right time of course). Or hot glue a little balsa landing pad right at the entrance.