1. Tomatoes
Select a few not-so-good tomatoes, put them in the saucepan and boil. The charred bits on the bottom will gradually peel off, then you can simply wash it.
2. White Vinegar or Tea Leaves
Pour half a bowl of white vinegar into the charred saucepan, add water and boil for about three to four minutes. After boiling, let the saucepan sit for about five minutes to cool slightly. You'll then see the charred bits peel off completely. Finally, give it a simple wash.
3. Salt
Place the saucepan on the stove and dry-heat it over low heat for a while. When the saucepan smokes, sprinkle some salt on it, shake it for a minute, then turn off the heat and scrub with a scouring pad. It will clean very well, leaving no residue and no burnt smell.
4. Onions
The bottom of milk saucepans often accumulates burnt milk residue, which is difficult to clean. If you cut a few slices of onion and boil them in the saucepan, you can remove the burnt residue. The yellow juice that comes out when boiling onions helps remove any burnt bits.