There is special stuff you can get at the chemist for cracks, isn't there?
For my hands and feet I have been using MooGoo Udder Cream because they were peeling excessively after using a corticosteroid for eczema. After only a week and a half I've found it fantastic on my hands, and pretty good on my feet (but I haven't been re-applying all day to my feet as I have to my hands. The moogoo is great, and they were really efficient in delivering it too.
Hope it gets all fixed up soon for you, matey.