When filling the steam, you must turn up the steam at one time, so that the steam can blow the milk in the milk tank to form a vortex.
To control the temperature of the milk, why it is not good to hit the foam when the milk temperature is too high? this is because there is a kind of glue in the milk, which is dissolved at low temperature, and affected by the temperature, this kind of colloid will coagulate and change from the sol state to the gel state. Everyone has seen this kind of gel, that is, the skin formed above the boiled milk. When hitting milk foam, the gel phenomenon will affect the effect of milk foam, so when beating milk foam, it should be controlled between 66 and 71 degrees, that is, feel the bottom of the milk tank with your hands.
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