Just presoak feet, apply the gel, let sit for 5–10 minutes, and rinse! It’s recommended you go back in afterward with a foot file just to make sure no residue or dead skin is left behind.
Promising review: “Best product I’ve ever got from Amazon. This thing is really what everyone said it is: MAGIC. I cannot believe after one use the results of my callouses, just years and years of pain, shaved down without any surgical treatment! WOW! I seriously have no words. If I could give this product 1 million stars, I would. If you’re someone who’s had horribly callused feet for years, PLEASE BUY THIS!” —Jess
Get it from Amazon for $14.99 (also available as a two-pack and in two scents).