In the summer I spend lots of my time outside working wearing flip-flops.  My feet hate it, but I feel like I will suffocate if I wear shoes and socks in the summer.  I used to get deep cracks on my heels that were very painful.  I would soak them, and exfoliate them, and use foot creams, and scrape them with all kinds contraptions and none of it worked very well.  I would smear them with vaseline, or Neosporin and put socks on over the messy stuff to sleep, but nothing made much of a difference.  Then a friend of mine gave me this super cheap simple recipe and when I use it regularly I don’t have any problems with my feet.