The spot on the bottom of the health pot is scale, which is normal. Water contains impurities such as calcium and magnesium, which are deposited at the bottom of the pot after heating, so there are some small spots similar to mildew spots. With the increase of boiling times, this phenomenon becomes more and more serious until a thick layer of "water rust" appears.

Solution: This can be wiped off with a scouring pad. To completely solve the problem, replace drinking water or install a water softener.

Extended data:

When buying a thermos, in addition to paying attention to the same insulation effect and shell quality as ordinary thermos, you should also pay attention to the following three points:

1, reliable pressure. It should be noted that the air pressure cover can not be tilted when pressed, but can only be vertically downward, and the pressing range should be large, too small will affect the water outlet effect. If one hand presses on the air outlet and the other hand presses on the top cover, there should be no chronic air leakage at this time.

2, reliable accessories. The water pipe should be made of stainless steel, and the sealing ring of the bottle mouth should be made of silicone. Other materials are not strong or hygienic.

3. The bottom rotating disk should be able to rotate 360 degrees, and it is better to rotate effortlessly.