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.Click to see full answer. Also to know is, what is the best spray to kill wasps? Top 5 Best Hornet Sprays Viper Insecticide Concentrate (our top pick) Raid Wasp & Hornet Killer Spray (best traditional spray can) Syngenta Demand CS Insecticide. CRC Wasp & Hornet Killer Plus Insecticide. Ortho Hornet and Wasp Killer. Subsequently, question is, does Hairspray kill wasps? Hairspray does not kill wasps per se but it does stick their wings together, so they drop to the ground unable to fly. Hairspray does not kill wasps per se but it does stick their wings together, so they drop to the ground unable to fly. Also know, 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.Does vinegar kill wasp?White vinegar is a natural and easy alternative to kill wasps. Simply mix a cup of vinegar with a cup of water (or any equal amount) in a spray bottle and carefully spray the offending pests.