I had a bad case of splitting and cracked fingers and heels after returning from the tropics to a temperate climate. What worked best, and almost overnight, was 100% calendula ointment, very soothing as well. Using products containing mineral oil is counter-productive, so keep away from petroleum based products, and spend a bit more on the pure stuff. Also, increasing Vit C and Zinc is a very good idea for this condition. I'd order this online from overseas if I couldn't get a good quality calendula, it's excellent for many skin conditions. In Australia, the best brand is made by Sunspirit.