Even though you don't want to slip on one... the contents can be your best friend. The banana makes a superior skin softener. The warm summer weather can really take a toll on your feet. Try this mask for weatherworn heels:
Mash half a banana in a bowl
mix in a few drops of honey
then massage into your heels
Wrap your feet in plastic wrap and allow the mixture to soak in for at least 10 minutes.
Rinse, then gently exfoliate the area with a pumice stone.