The usage is simple and quick: immerse your feet in a basin of warm water for at least five minutes to soften the skin; pat your feet dry with a towel and gently begin to rub the foot file under your feet, making sure not to touch the toes. After use, clean the rubbed area again to remove dust and residues of dead skin, and finally, massage your feet and heels with a moisturizing and soothing cream to prevent cracks.