We apologize but we cannot offer a guarantee on Demon Max as we cannot guarantee that they will be used as directed. We do try to provide as much information as possible on what to expect and how to to use as well as what to do non chemically. We do know they work and you can read previous customer reviews right on the product pages.
However, if the product does not work for you, we try to troubleshoot to see what may have gone awry ,
