Sessioncoffeedenver Espresso Channeling Prevention Wander

Why Your Espresso Shots Sometimes Taste Bad If you have pulled enough shots at home, you have seen it happen. The espresso machine hisses, the portafilter locks in, and then a thin stream of liquid shoots out from one side while the rest of the puck stays dry. That is channeling. It ruins your shot and your morning. Channeling happens when water finds a weak spot in the coffee puck and carves a path through it. The water bypasses most of the grounds, so you get a sour, wea