Just light the wasp nest on fire, and they'll never come back. I've taken out hornet/bee/ wasp nests in many ways. Throw raw apples and pears at their nest, paintball the nest, hose the nest, or just use this thing that comes in a can and has quite a shooting distance and it kills wasps from like...20 feet away. Of course running isn't my fav. thing, so I leaned out the bottom window and just shot it straight upwards and it still did the job. Dead wasps with their legs in the air on the deck the next morning.