Every summer without fail, I get the worst case of what the Missus and I call "Zombie Hoof", where my heels crack open till they bleed. It is painful enough that I hesitate to put on shoes and it is difficult to walk. I've been using this heel balm ("Flexitol") the Missus came up with at Walgreens and it works fairly well on the worst of the cracks, but after the fact and it takes a good three days till it stops hurting. The cream is made in Australia, and the label says the main ingredient is concentrated urea. (No,...