How to use the machine steam pipe to make milk foam

Preparation before frothing understand the correct operation process of the coffee machine steam system, understand the purpose of the empty steam pipe before and after frothing, understand the importance of towels and hand cleaning in coffee making. Learn how to touch the milk surface with the nozzle, the position of the selected point, and the depth of the selected point. Two temperature problems: one is the temperature at which foaming begins and ends, and the other is the temperature at which foam is made.