Onion. While you may not be too fond of smelling like onion, you would be surprised at how fast it can make a corn vanish. Slice a piece of onion and submerge it into a splash of vinegar – white or apple cider vinegar will do just fine. After letting the onion soak for at least three hours, place it onto the corn securing it with some sort of skin-friendly tape or a bandage and prepare to leave it on through the night. Once the corn gets soft enough, you can file it down. This method often works faster than that of a lemon.
