Pouring a bucket of boiling water onto the wasp nest accomplishes two things. One, it immediately kills scores of wasps and two, it ruins their nest. A second method—similar but slightly superior to the first—involves the addition of liquid dishwasher soap to the boiling water before you pour it on the nest.Click to see full answer. Consequently, how does soapy water kill wasps?Shoot a mixture of 1 tablespoon (15 mL) of dish soap per 1 cup (240 mL) of water. Pour hot water into a spray bottle and add your dish soap. Locate the wasps and spray them until they stop moving. If possible, use a hose-end sprayer for a more direct application.Similarly, how long does it take for a wasp to drown? five minutes Then, what home remedy will kill wasps? Natural options Try diluting a little peppermint oil in water and spraying it where you frequently get wasps. You can also plant peppermint in your garden to deter the little critters. Another option is to mix a cup of white vinegar with a cup of water and put it in a spray bottle.Can you drown a wasp nest? Drown Them While water will not be effective on wasps which are flying round, it can be used to eliminate underground nests and all the occupants.