Fill a bucket or your bathtub with about 10 liters of hot water. Next, add a liter of apple cider vinegar and about a handful of salt (Epsom salts work very well). Stir well to mix everything together. Then soak your feet for about 10 minutes or until the water begins to cool down. When you are all finished, dry your feet and head right to bed to relax and sleep. It also helps to wear socks to bed or cover up with a blanket to keep your feet warm and toasty.