I use a cheep moisturiser on my feet, just squidge a big dollop on and rub in when they feel dry. I cannot stand my feet or hands feeling dry, ugh! Remember to do between your toes too, and well up over the foot.
My feet have never cracked, despite never wearing shoes much when I was younger.

Of course it might be a sign of a fungal problem, might be an idea to see your dosctor. Athleats foot dosn't always itch!