When my carport was an open carport, I used to get big wasp nests in the joists. I remember one that got quite large and was positioned so it was difficult to reach with spray.
I made a torch with conduit and rag tied on with bailing wire. Soaked in mineral spirits thinner. Old school. I lit it and held it under the nest. It did the job very nicely. They fell just like small stones and none escaped. Once on the ground, I dispatched them with flying insect spray as I don't delight in seeing even my worst enemies suffer.
The wasps made a distinct sound as the fell to the ground. Zooooop, Zoooop, Zoooop. I guess it was them trying to flap wings that were burned off. They sounded just like a ziltch.
For those who do not remember their hippy days, or just didn't participate, a ziltch was a plastic dry cleaner's bag tied in a bunch of knots and hung from a tree branch with a coat hanger wire hook. You lit the bottom of it and it burned fairly slowly, melting the plastic which dripped in decorative and entertaining fashion — making a distinctive "Zoooop"sound.
We would put a pan of water to catch the drips. The more adventuresome of us would lay, facing up, on the ground beside the catch pan for best effect, but not too close.