The cleaning methods of the burnt bottom of the casserole are as follows:

1. Soak in hot water. If you want to clean the blackened position at the bottom of the casserole, you can soak the casserole in boiling hot water until the blackened position at the bottom of the casserole becomes soft. When the hot water becomes cold, replace it with new hot water to continue soaking. When the blackened position at the bottom of the casserole falls off, use a cleaning ball to scrub the blackened position, and finally rinse the casserole with clean water.

2, scrub with incense ashes. You can evenly smear the incense ashes left by burning mosquito-repellent incense on the blackened position at the bottom of the casserole, and then constantly wipe the blackened position at the bottom of the casserole with a steel grit cleaning ball, which can generally be cleaned. If you don't have incense ashes at home, you can also use plant ash instead.

3. Scrub with charcoal. You can buy some barbecue charcoal in the physical store first, and then let the barbecue charcoal burn. When it burns halfway, use cold water to cool the burning charcoal, and then use charcoal to constantly wipe the blackened position at the bottom of the casserole, which can generally be cleaned.

4. Scrubbing grapefruit skin. You can first put a part of grapefruit peel in the casserole, then pour a proper amount of water into the casserole, and then put the casserole on the stove to boil. The grapefruit peel boiled in the casserole will remove the black marks printed by the blackening of the casserole, and then use another part of grapefruit peel to wipe the blackened position at the bottom of the casserole continuously, so that the bottom of the casserole can be cleaned.

5, white vinegar cleaning. If it burns lightly, you can soak it in water for more than two hours, and then scrub it with something like coarse cloth. If the food is completely carbonized and stuck to the bottom of the pot, you can soak it in white vinegar and clear water for about an hour, then boil it for ten minutes on low heat, and then find a tool such as scouring pad to scrub it. Try to avoid using hard and sharp tools such as steel balls to avoid hurting the enamel layer.