Cornex Corn And Callus Remover Removes painful calluses & Corn. Medicated disk safely removes callus & corn. Soft felt pads protect callus from painful shoe pressure and friction with Comfortplus cushioning. DIRECTIONS: Wash callus area and dry thoroughly. Cut medicated disk to fit callus. Apply medicated disk with sticky side adhering to skin. Cover medicated disk with enclosed cushion. After 48 hours remove the medicated disk. May soak foot in warm water for 5 minutes to assist in disk removal. Repeat this procedure every 48 hours as needed for up to 14 days (until callus is removed).