Caution: When using for the first time, wash thoroughly and heat, dry, and apply oil before using. Very high temperature when and immediately after use.Beware of burns. When using the handle, please make sure that it is inserted securely into the hole before using. Please do not apply water when the main unit is hot.Heat shock may cause cracking. It may crack if dropped from a high place. After use, please wash with warm water without detergent and apply edible oil before storage. It will rust if you do not apply oil.