These things are so gross, they're cool. After a few days, my feet were peeling away. I got them at Ulta. I used a foot brush to help some of the dead skin fall off but was sure not to rub too hard, as it was fresh and delicate skin. It left behind suuuuper soft feet. But, if you have major cracks, like on the verge of bleeding, they may not disappear with one use.