Material preparation: egg shell, white vinegar.
Step 1: Crush the egg shells with your hands.
Step 2: Put the crushed egg shell into a thermos (the main component of the egg shell is calcium carbonate, which reacts with white vinegar to produce water-soluble minerals and carbon dioxide gas, which can accelerate the decomposition of scale).
Step 3: Then pour 25ml of white vinegar into the thermos (the main components of scale are carbonates such as calcium carbonate, and the acetic acid in the vinegar will react with it to produce water-soluble minerals and carbon dioxide gas).
Step 4: Shake the thermos vigorously up and down (to fully react the white vinegar and limescale).
Step 5: Then place the thermos for 30 minutes.
Step 6: The gallbladder in the thermos has been resolved.
Pour an appropriate amount of vinegar into the thermos, and then pour boiling water. The water level is subject to the position where the scale exceeds the scale, and then plug the thermos tightly. If you are worried about the vinegar smell entering the thermos, you can wrap the thermos in a plastic bag first. Usually after two hours, the scale is basically dissolved, the waste water is poured out, the bottle is washed, and it can be used again.
