The method of cleaning the carbon deposit at the bottom of the siphon pot for coffee utensils

The method of cleaning with salt or toothpaste is exactly the same as the loofah towel principle, is to "grind" the carbon deposits, so that it is easy to leave scratches on the bottom of the glass ball, these scratches are the hidden danger of burning in the future.

The correct way is to use soda noodles (or soda ash, baking soda), the kind commonly used in steamed bread cooking. Gently rub the alkali surface with water on the carbon deposit, you can soon see that the alkali surface blackens and dissolves, and the glass surface is as bright as new.

Some friends want to ask, aren't you rubbing with alkali noodles? In fact, this is just to make the alkali better and faster to react with carbon deposits. To be exact, what is firmly covered on the glass is not carbon deposits, but something similar to tar. If it is pure carbon accumulation, it should be gently wiped off, and the tar that cannot be wiped off will react and dissolve with the alkali surface. In addition, the alkali surface because the particles are very small, low hardness, so light friction will not scratch the glass.

To verify the above conclusion, you can do a simple experiment. Cover the wet carbon deposits on the bottom of the glass ball with salt, toothpaste and alkali respectively, without friction, wait for a period of time to see which way the carbon deposits go down faster and more.