You can use sulfuric acid and lime, but the risk is a bit high ~ It is recommended to apply hot water to your face (the temperature is slightly higher) to relax your pores ~ Then use whitening facial cleanser (never use moisturizing). If the effect is good, pull it in a week! After washing, there are still a lot of old skins on my face! But it is also easy to remove! I don't need to teach you this ~