It's easy to have corns on your feet. You just have to break the bottle. If you are looking for a piece of glass to make a glass blade, you need to find a piece of glass. Just cut the skin off the thick corns on your feet. Then cut it when it is almost thick at ordinary times, remove the thick skin, and stick to it for almost half a year, and it will not grow. That's how you get rid of the corns on your feet. Just stick to it. Not as normal as the other foot. As for those old plasters, they are particularly painful if they are not rooted.