Put the calendula in a bottle and pour the oils. Place in direct sunlight. After 3 weeks strain. Heat the beeswax in the oil in a double-boiler until melted. Remove from heat, let it cool slightly and add the peppermint essential oil, drop by drop and decanting into a jar.
Apply directly to dry cracked feet and heels. For intensive treatment, apply liberally, put on old (clean) socks and let sit overnight.