Will Brake Cleaner Kill Wasps?

Brake/Carb cleaner will kill wasps faster than anything I've ever seen. It also kills the 'scent', that guides other wasps back to the nest. It's a pretty direct stream, so you have to right on target to hit all the wasps. It can remove paint or discolor finishes.

What kills wasps instantly?

Use soap and water

Mix two tablespoons of dish soap into a spray bottle of water and spray it on the nests. The mixture will clog the wasps' breathing pores and kill them instantly.

What can I spray a wasp with to kill it?

Homemade spray: Mix one teaspoon of dish soap with two cups of water and spray this solution on the wasp and wait 10-15 minutes until it dies.