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Turn off the coffee machine after use and leave the knob in the steam position to exhaust and relieve pressure: because in the production of coffee, a large amount of high-pressure gas will be produced inside the heating machine, and the gas needs to be discharged to open the water inlet lid; at the same time, it is also to prevent the boiler from being damaged by excessive pressure in the boiler the next time it is heated. If the coffee machine is often used, that is, the time interval from the next use is not long, it is not necessary to release the steam after the machine is turned off, because if the temperature changes rapidly, it is easy to speed up the process of thermal expansion and cold shrinkage of the boiler, thus making the metal fatigue prematurely.
