Wear the foot masks and put tape around ankles to keep the masks in place. Wait for 60 to 90 minutes until the mask content is absorbed. Remove the masks and wash off thoroughly. Dry. Dead skin cells and calluses will start falling off your feet in 4 to 6 days after application. Do not scrub them off. It takes about 2 weeks for all the dead skin cells and calluses to peel off and reveal softer, smoother skin underneath.