I wear Chaco Sandals a lot when hiking. A drawback to wearing sandals is dry cracked feet. To avoid them, I filed my feet with a foot file, greased them up with Carmex and put plastic shopping bags over my feet while I took my siesta. Carmex comes in .35 ounce tubes and is found at most stores along the way.
If I neglected my feet too long, I used super glue to glue the cracks together. The cracks felt like walking on glass. Super glue is key to comfort when you have cracked feet. It is also sold at most stores along the way.