And if you really HAVE to use any applicants, stay away from anti-perspirants they WILL make it worse. Vaseline type of lubes are good, but the best thing in your case and its not a joke, is OLIVE OIL. I promise you it works and does not interfere with your natural system like anti-persparnts do, it will help make a thin seal over the crack or exposed areas much like another layer of skin on a macroscopic level. Try not to use savlon and anti-perspant .