By the time I started to try essential oils the Staph had all ready been 6 months in the making and the only oil that ever worked was White Thyme whose effect is unbearable when applied unless cut with a base oil and then it becomes too diluted. I wish it would have worked as it would have been gone by now and saved me the investment of high ppm Colloidal Silver . Staph feeds on sugars in the blood stream and I have removed whole cocci with a 1/2 inch root.I have used 40 to 1 Miracle-Mineral-Supplement which I can only take in moderate amounts. With this capability I can also test the ability of any subtance as to its effectiveness .. no oil except for Thyme ever worked with 2 controls being Clorox and plain water in individual containers with one sample. Clorox kills but not for consumption or even topical application on a larger area because it beelines into the bloodstream. Plain water of course no effect and more for a control with Thyme taking taking much longer than Clorox but still very effective. Oregano oil? no change and so I killed them with bleach and sent them down the drain. The thought of this is an exchange of ideas and each person is unique but perhaps others have an experience to share .. we never know.