Before you go to bed: soak your feet in warm water, exfoliate the heels with an exfoliator by Dr. Scholl's, rub UDDER BALM or VASELINE on the heels and put on white socks. Sleep in these all night. In the morning soak the feet in warm water again, rub in a light coating of VASELINE and put on your shoes. IT is the going barefooted that helps cause the cracked heels. I had them until I wore shoes or EARTH SHOE sandals found at Wal-Mart. The above procedure worked for me.
source : personal expeerience