It can be cleaned with white vinegar, baking soda, salt and toothpaste. The following is the specific operation method for your reference. First prepare the materials: casserole, white vinegar, baking soda, salt, toothpaste and scouring pad.

1, prepare the casserole first, and then pour in an appropriate amount of white vinegar, which should not reach the bottom of the pot.

2. After pouring the white vinegar, put the casserole on the fire and boil it.

3. After the fire boils, turn off the fire and pour in a proper amount of baking soda (if there is no baking soda, you can put edible alkali).

4. After pouring baking soda, put aside and soak for 30 minutes.

5, 30 minutes later, pour out the white vinegar, and then sprinkle with the right amount of salt, you can put more.

6. Squeeze the toothpaste onto the scouring pad.

7. Scrub the casserole with a scouring pad.

8. If the casserole is dirty, scrub it several times. Take the following picture as an example, scrub for 2 minutes.

9, after scrubbing, rinse with water, and then dry.