If the iron pot is rusty, you can heat the iron pot and wipe it off with a cloth dipped in vinegar, which is simple, quick and thorough. Don't wash it too clean after each use, leave some oil to prevent rust. You can heat the iron pan first, then pour a little oil, spread it evenly with a shovel, then turn off the heat, and rinse it with clean water when using it the next day. Aistar kitchenware salesperson said that when choosing an iron pan, you should pay attention to the following points. 1. The surface of the pot should be as smooth as possible, but it cannot be required to be "smooth as a mirror". Due to the casting process, the iron pot has irregular shallow lines. This is not a fault. 2. Check for defects. There are two main types of defects: small bumps and small pits. The raised parts of small bumps are usually made of iron and have little impact on the quality of the pot. If the bulge is on the concave surface of the pot, grind it off with a grinding wheel to avoid blocking the spatula. Small pits are more complicated and are more harmful to the quality of the bowl. There are three main situations, namely trachoma, air hole and shrinkage eye. The prone area for "three eyes" is in the center of the convex and concave sides of the pot, which is the throat area where molten iron is poured. You need to pay attention when purchasing, because some people use graphite to fill the pits, which is not easy for ordinary people to detect. They can only brush them with a small brush to expose them. 3. The part at the bottom of the pot that touches the fire is commonly known as the butt of the pot. A pot with a big butt is not good because it spreads the fire slowly. Fire-consuming and time-consuming. 4. There are different thicknesses of pots, and thin ones are better. Some iron pots may be thicker on one side and thinner on the other. This is caused by misalignment of the model. Such uneven thickness pots are not good. When purchasing, you can turn the bottom of the pot upward, hold the concave center of the pot with your fingers, and tap it with a hard object. The louder the sound of the pot and the greater the vibration in the hand, the better. This method can also be used to check whether the pot has cracks. Cracks usually occur on the edge of the pot because it is the thinnest. 5. If there are rust spots on the pot, it does not necessarily mean that the quality is poor. The brightness and quality of the pot have little effect. Because the substance that makes the pot shiny is graphite. Graphite is used as a refractory coating in casting. After the pot is cast, graphite objectively has the effect of preventing the pot from rusting. Pots with rust spots indicate that they have been stored for a long time. The longer the pot is stored, the better, because the internal structure of the pot can become more stable and less likely to crack when first used. 6. Cast iron pans (also called pans) are mostly used for "frying" and "roasting" without requiring high heat, so it is better to have a thicker bottom and a heavier weight. Tips for rust removal and rust prevention: Remove rust from radish and potato peels. The kitchen knife is rusty. Not only is it not sharp, it also has nasty rust stains when cutting things. You can easily remove rust by dipping cut potato peels or radish peels in a little fine sand and rubbing the blade surface vigorously. Tea residue is anti-rust. Iron pots are prone to rust spots when exposed to moisture, which are difficult to remove. You can use a gauze bag filled with tea leaves to wipe the iron pot to prevent it from rusting. Rice water prevents rust. If you clean kitchen knives, spatulas, iron spoons and other iron cooking utensils and immerse them in rice water with a higher concentration, you can prevent them from developing rust spots quickly, because the rice water will add a protective film to them. Cigarette tin foil rust removal. The copperware at home has developed a green patina. You can use the tinfoil used to wrap cigarettes dipped in salt and wipe it carefully. This will not only remove the rust, but also make the cleaned copperware as bright as new.