No Chemicals!!! The Essential Oils product Brett used is effective! We have a wasp issue; our peaks are very high as are our windows, we want to protect the window cleaner and painter so they can do their job without concern of being stung. Brett was able to get this job done right away for us. Brett solved ‘all’ of our pest problems and the house smelled good while he was working. I’m so happy with this product Brett suggested. Oh, and Brett is very knowledgeable. He will be regularly servicing this property!