1, method 1, need to prepare edible alkali, salt, toothpaste, water and scouring pad. Put edible alkali and salt on the black scales at the bottom of the pot, then squeeze a piece of toothpaste, and then wipe the black scales at the bottom of the pot with the rough side of scouring pad. Finally, turn on the tap and wash the bottom of the pot with clear water, and you can see that the black scales are easily washed away. The principle used is also very simple. Edible alkali has a very strong cleaning and decontamination effect, and the friction agent contained in salt can increase the cleaning effect. Toothpaste has whitening agent and friction agent, and also has the ability of cleaning and decontamination.

2. Method 2: The materials to be prepared are a bowl of salt, white vinegar, baking soda, paper towels, clear water and steel balls. Pour salt and white vinegar into a bowl and mix well, then pour baking soda on the black scales at the bottom of the pot, soak the paper towel in white vinegar water and cover the bottom of the pot. It can be seen that white vinegar reacts with baking soda to produce acetic acid, which has a very strong cleaning effect. Wait for half an hour. During the waiting process, you can pour the remaining white vinegar moisture on the paper towel several times, which can achieve better decontamination effect. Time is up, cut off the paper towel and brush it gently with steel balls, and the dirt and grease will fall off. Finally, clean the bottom of the pot with clean water, and the bottom of the pot will become brand-new. Cleaning the bottom of the pot in this way saves time and effort and will not damage the bottom of the pot.