Fasten the cap, ensuring it locks into the grooves tightly. Flip the whole assembly over with haste and control. Position it on top of your mug or jug and begin applying downward pressure. If the pushing feels too easy, your grind is likely too coarse; if it’s very hard to push, the grind is probably too fine. Your coffee is fully brewed once it begins to make a hissing sound. This means there is no more water to push through the device.