Commercial snake repellents have not been proven to be effective, Robert T. Mason, professor of integrative biology at Oregon State University, has found in his research. ● A report by the U.S. Department of Agriculture found that cinnamon oil, clove oil, and eugenol will drive off snakes. However, the snakes must be sprayed directly and, when the substance dries, there is nothing to keep the snake from returning.  ● Although it may not be recommended by experts, there is an EPA-approved chemical repellent for snakes that is available in stores, a product called "Snake-A-Way." It was found to be safe for humans, animals, and plant life.  In general, repellents are not recommended for snakes. Removing habitat areas and food sources around your home is a more effective way to discourage them from coming around your landscape.