Duct tape eliminates warts better than liquid nitrogen, according to a study in the Archives of Pediatrics and Adolescent Medicine. If you have a wart, cut a piece of duct tape slightly larger than the wart and apply it to the cleaned area. Every few days, remove the tape and exfoliate the wart with a pumice stone or nail file. Repeat until the wart is gone.
Scientists aren't sure why duct tape is so effective, but they reason that a chemical in the tape could be the cause. It could also be that duct tape irritates the area and stimulates the body's immune system to attack the wart.