I had cracking heels for ages, until I was diagnosed as diabetic, and footcare is now a priority. After a bath, scrape off the softened skin. I use the scissor blade, then rub in one of the creams you can buy at the chemist for cracked heels, then put clean socks on. I do this once or twice a week, and my heels look almost normal now.

Of course, the diabetes has damaged the nerves in my feet, and I feel as though I've got socks on all the time, but it MAKES me take care of them.