If you’re like most people, your coffee maker is the hardest working appliance in your kitchen. It faithfully brews that life-giving morning cup before you’ve even fully opened your eyes, and it never complains about being asked to produce a second pot for guests. But like any hard worker, it needs a little care now and then. Over time, you might notice your coffee taking longer to brew, tasting a bit off, or simply not getting as hot as it used to. The culprit is almost always scale, a chalky mineral buildup that comes from the water you’re using. Even if you have a whole-house water softener, trace minerals still find their way into your machine and leave behind deposits. The good news is that descaling your coffee maker is a simple, inexpensive DIY project that can extend its life by years and make your morning brew taste fantastic again.

Let’s talk about what five actually is. When you heat water, the dissolved calcium and magnesium in it separate out and cling to metal surfaces. You’ve likely seen this white or yellowish crust on your faucet aerator or the inside of a tea kettle. The same thing happens inside your coffee maker, especially on the heating element and in the water lines. As this scale builds up, it acts like insulation, so your machine has to work harder to heat water. That’s why you notice slower brewing and weaker coffee, because the water isn’t reaching the right temperature to extract all those delicious flavors from the grounds.

The descaling process is straightforward. First, check your coffee maker’s manual for any manufacturer-specific instructions, because some machines have a descaling cycle built in. If you don’t have the manual, don’t worry. You can easily find it online by searching for your model number. For most coffee makers, you’ll want to use a mixture of equal parts white vinegar and water. Vinegar is a mild acid that dissolves mineral deposits without damaging plastic or rubber parts. If you don’t like the idea of vinegar, you can buy commercial descaling solutions, which are also effective and often have a pleasant citrus scent. Either way, the process is the same. Empty the machine, then fill the water reservoir with your descaling solution. Place a large empty carafe or pot underneath, and run a brewing cycle exactly as if you were making coffee, but without any grounds. When that cycle finishes, let the solution sit in the heating chamber for about thirty minutes. This gives the acid time to work on stubborn deposits. Then run another full cycle with just the solution to push everything through. Finally, run at least two or three cycles with plain fresh water to wash away any remaining vinegar taste. If you can still smell vinegar, run an extra cycle.

Now, what if your coffee maker has a glossy exterior or touchscreen controls? Be careful not to submerge the machine or get water into the electronics. Only fill the water reservoir and run it normally. For the outside, use a damp cloth with a drop of dish soap to wipe away any splatters. Never use abrasive cleaners that will scratch the finish.

How often should you descale? That depends on your water hardness and how often you brew. A good rule of thumb is every three to six months. If you notice your coffee maker making strange gurgling sounds, if the brewing time has doubled, or if your coffee just doesn’t taste right despite using good beans, that’s a sign to check for scale. Some newer machines even have a descaling indicator light that will come on when it’s time.

Beyond your coffee maker, the same principle applies to other beverage appliances. Your electric kettle might need descaling even more often, because you’re boiling water directly and leaving it in the kettle. Your espresso machine, with its tiny internal pipes, is even more sensitive to scale. And if you have a countertop ice maker or a hot water dispenser, those benefit from regular descaling as well. The vinegar solution works for all of them, just rinse thoroughly afterward.

A little preventive maintenance goes a long way. Using filtered or distilled water in your coffee maker reduces scale buildup, though it doesn’t eliminate it entirely. Also, don’t leave coffee sitting in the carafe for hours, as that can lead to its own kind of residue. Give your machine a quick rinse after each day’s use, and wipe down the warming plate.

By spending about twenty minutes on this simple task, you’ll avoid the frustration of a broken machine and the cost of a replacement. You’re not just cleaning a coffee maker, you’re taking care of your morning ritual. That’s a worthwhile DIY project for any homeowner.