To use apple cider vinegar for skin tags, use a piece of cotton big enough to cover the skin tag and soak it in organic apple cider vinegar. Hold the piece of cotton in place with a band aid and leave on overnight. Repeat this nightly until the skin tag turns black. Once it turns black you know it's dead and it's just a matter of time until it falls off. It took about 3 nights before mine turned color and than a couple more before it fell off. Good luck!