When the kettle is used for a long time, there will be a thick hard object on the inner wall, which is "scale". Some people worry that if you drink water, it may form stones in your stomach and endanger your health. Tap water contains calcium bicarbonate and magnesium bicarbonate, both of which are soluble in water. But in the process of boiling water, when they release carbon dioxide, calcium carbonate and magnesium carbonate will be formed. These two ingredients are called scale, which is insoluble in water and will precipitate at the bottom of the pot.

So are these two substances edible? In fact, everyone can understand them as calcium and magnesium. These two minerals are essential elements for human body, which naturally will not cause harm to human body, but they will be uncomfortable after drinking. Of course, the main purpose of drinking water is to replenish water. Don't think too much. Don't always think about drinking some kind of "better water" to keep healthy, and don't worry that drinking pure water for a long time will lead to nutritional deficiency. If you want to supplement minerals, the best way is to supplement them through food. A normal diet is the main source of minerals. In addition, water containing scale has poor performance. On the one hand, white precipitation itself affects appetite. On the other hand, people who have drunk this kind of water know that the taste they drink is not very good, so the rice cooked by them or the tea made by them will taste much worse.

So finally, I'll teach you a few tips to remove scale:

First, use vinegar. White vinegar and vinegar can be used. Add about 10% of kettle scale, then add water to boil and let stand for one hour. Finally, the scale is easy to wash off.

The second is baking soda. This operation is the same as the previous vinegar, except that the vinegar is replaced with baking soda. Generally speaking, adding a spoonful of boiling can remove dirt, and the effect is often better than vinegar.

The third one uses tea. The characteristic of this coup is that it doesn't need to be cooked. Put the tea residue rice into the kettle, then shake it a few times, and the scale will fall off after the last period of time. But the effect is often weak and needs to be carried out many times.