That wasp spray used to be real deadly about 30 years ago. They used to drop immediately, and could not fly. Now the stuff just seems to make them mad as they fly and sting.
A few years ago, I had a ground nest of yellow jackets. I sprayed them about 20 feet away, one came up out of the hole and flew straight at me, landed on my upper lip and got me. I swell up and in the past had to go to the ER for an adrenaline shot. The spray didn't get into the nest. I waited till after dark, and poured a quart of gasoline in the hole and put a flat stone over it. They were dead by morning. This was the second one I found on my property. When I did them up, they seem very large and extensive, so they must be able to take a mole tunnel and move the earth out of the hole to make room for their nests of paper.