Listerine Vinegar Foot Soak -- Claims that a soak causes the dead skin to fall off! Be sure to not use blue Listerine, dyes the feet! And use apple cider vinegar for softer feet (also helps with nail fungus!
I'd love to do this for my mom using my son's giant man-sized feet as a gag gift! He does love his grandma. Mother's Day handprint and footprint gifts: "I Love You Grandma" Print by Pitter Patter Print at Etsy