Using vinegar as a skin toner dates back to the time of Helen of Troy. And it’s just as effective today. After you wash your face, mix 1 tablespoon apple cider vinegar with 2 cups water as a finishing rinse to cleanse and tighten your skin. You can also make your own facial treatment by mixing 1/4 cup cider vinegar with 1/4 cup water. Gently apply the solution to your face and let it dry.