Sorry to hear this! We'd expect this product to kill wasps on contact, so your feedback has been passed along. We'd also appreciate the chance to help further, so when you have a moment, please email us here: https://contact.scjbrands.com/en-us. Or call 1-800-558-5252, weekdays from 8 AM to 6 PM CT. Your reference number is: 019530645A.

Oh no! We'd expect each can to spray up to 22 ft, so your feedback has been shared with the appropriate people. And so we can best assist, please reach out to us at 1-800-558-5252. We're available weekdays from 8 AM to 4 PM CT. Or you can email here: https://contact.scjbrands.com/en-us. Your reference number is 020010984A. - Elizabeth, SC Johnson Consumer Care