Wasp-washing

I'm bushed, unlike the indefatigable wasps that keep clustering on the table leg near the deck chair where their hive was before I blasted it with the hose a couple of nights ago. Every evening, I wait until sunset, then wash them away again. They keep coming back. I have several posts aborning, but I must sleep.

Is wasp-washing like straining at gnats? Is this why I'm so exhausted?