After putting your feet out of the hot water dry them with towel and rub the aspirin against the rough parts of your skin in order to loose some of the dead skin. You should apply more paste on the driest areas of your feet. After that wrap you feet in plastic wrap and then put on the socks. You should stay with the paste from 4 to 6 hours (until you go to bed). Then remove the wraps and wash your feet with soap and water.