But here’s the skinny on tea tree: It’s an essential oil, which you should always, always dilute before applying to the skin, which is why tea tree oil face washes have seen a boom in popularity; these typically come buffered with carriers and other hydrating ingredients to balance out the purifying properties. You’ll still want to patch test before opting for a full-on cleanse, though, as essential oils can cause irritation on sensitive skin. They’re certainly not for everybody, but for some (mainly those with congested pores) tea tree cleansers are hailed as magic. Lather up with 10 of our favorites. Our high standards also come from testing products—many, many products. Our editors and writers rigorously test and research the products featured in our roundups to offer you the best, most informed recommendations. When we write reviews, you can trust we spend quality time with the formulas: We don’t simply rave about products we’ve slathered on the back of our hand. We endorse products we’ve tried and loved. Learn more about our testing process and clean beauty standards here.