1. Warm it gradually and do not burn it suddenly on the fire to avoid swelling and cracking.

2. After the food is cooked, when the casserole is removed from the fire, use wood chips to support the pot to dissipate heat evenly and cool it slowly to avoid shrinkage and cracking. You can also make an iron ring according to the size of the casserole. After the casserole is removed from the fire, place it on the iron ring so that the bottom is not in direct contact with the ground and is suspended in the air to cool down naturally, which can make the casserole last longer.

3． Newly bought casseroles often leak because they have many blisters. When a new pot is used for the first time, it is best to make noodle soup or porridge. After eating, do not wash the pot, but put it on the stove to bake it to dry the batter in the pot and block the tiny blisters on the wall of the pot. Then wash. This way, the casserole won't leak.