Why is my coffee machine dripping slowly?

When your coffee machine begins to struggle, producing a slow, agonizing drip instead of a steady stream, it is usually a sign that the system's resistance is too high. In the world of espresso, this is often referred to as 'choking' the machine. The most common culprit is the grind size; if your coffee is ground too finely, the particles pack together so tightly that the water cannot force its way through, resulting in a very slow or non-existent extraction.

Beyond the grind, you must consider the state of your equipment. A clogged filter basket is a frequent, yet often overlooked, issue. Over time, coffee oils and fine particles can build up in the tiny holes of the basket, effectively reducing the surface area available for water to pass through. A thorough cleaning with a specialized espresso machine detergent can often restore flow to its original state.

If the grind and the basket are not the issue, the problem may lie deeper within the machine. Pressure issues are common in older machines or those that have not been properly maintained. If the pump is failing or if there is significant mineral scale buildup (limescale) in the boiler or the tubing, the machine may be unable to generate the necessary pressure to push water through the coffee bed. Descaling your machine regularly is essential to prevent these blockages and ensure the longevity of your pump.

Finally, consider your dose. If you are using too much coffee for the size of your basket, you may be creating a puck that is simply too dense for the machine to handle. Always ensure you are using the correct dose for your specific basket size. By systematically checking your grind, cleaning your basket, and maintaining your machine's internal health, you can resolve most slow-extraction issues and return to brewing delicious, balanced coffee.