The science behind scale build-up in coffee machines
While invisible to the naked eye, all water carries minerals, including calcium and magnesium. These minerals aid your nutrition, but they can negatively impact surfaces they frequently come into contact with. If your home features “hard” water (exceptionally high in mineral content), you’ll notice these impacts even more.
As water evaporates, it leaves these minerals behind in the form of a white chalky film called “limescale”. Excessive limescale can block pipes, stain tiles, and hinder your coffee maker’s functions.
Why descaling is essential for your coffee machine
So, you’ve mastered how to use your espresso machine, but now you’ll need to keep it in pristine condition. The water you use to brew coffee and espresso leaves the interior components of your machine wet. This water dries up, but its mineral contents remain.
Mineral deposits negatively impact coffee quality and machine performance in several ways:
● Reduced efficiency – Clogged tubing forces your machine to work harder, reducing its efficiency.
● Downgraded flavour – Limescale impairs the extraction process, leading to dull or overly complex-tasting coffee.
● Shortened lifespan – Scale buildup can damage machine components, resulting in premature breakdown.
A significantly scaled coffee maker can also harbour bacteria and mould, both of which harm your health.
How to know when your coffee machine needs descaling
Staying on top of coffee machine maintenance starts with knowing when it’s time to descale. Common signs of scale build-up include:
● Extended brew time – Since scale puts the machine under strain, it requires additional time to produce a cup of coffee.
● Strange noises – As your machine struggles to force water around mineral blockages, you may notice odd gurgling or sputtering sounds.
● Tepid coffee – Coffee that isn’t as hot as it should be could indicate that water is taking too long to work its way through your machine.
In severe cases, you may notice white limescale residue floating in your beverage.
Step-by-step guide to descaling your coffee machine
If you’ve started noticing some of the red flags of limescale, it’s time to descale your machine. Fortunately, regular descaling is a simple process that anyone can master.
Preparing your machine for descaling
Though vinegar is often used and can be effective at removing limescale, it’s recommended to find a proper descaling solution. Prepare for the descaling process first by picking up a quality descaling solution safe for your machine. Then, you should:
● Empty and dry the carafe
● Clear out any remaining coffee grounds
● Mix your chosen descaling agent
The descaling process
Once you’re all set up, take the following steps to eliminate limescale buildup:
1. Fill the reservoir halfway with vinegar and the rest of the way with water.
2. Return the carafe to its cradle and initiate a brew cycle.
3. Switch off the machine halfway through the cycle and let sit for one hour.
4. Turn your machine back on and allow the brew cycle to complete.
5. Pour fresh water into the reservoir and run another full cycle.
You may want to repeat the last step a couple of times to fully remove any lingering vinegar or descaling solution.
Once complete, brew a pot of coffee to ensure it tastes normal and your machine is no longer struggling.
Comparing different descaling solutions
Vinegar or a commercial solution—what is the best descaler for coffee machines?
Using vinegar as a descaler has advantages: it’s affordable and widely available. Over time, however, it may harm your machine’s rubber seals and gaskets. Vinegar also has an acidic taste that may infiltrate your coffee.
On the other hand, manufacturers formulate commercial descalers specifically to remove limescale from coffee makers, so they’re guaranteed to keep your machine running smoothly. Using vinegar instead of a descaler may also void your machine’s warranty.
Keep the coffee flowing with Sage
A delicious cup of coffee begins with a healthy coffee maker. The best way to ensure seamless brewing is to stay ahead of limescale buildup. For that, you need a powerful descaler solution.
Sage offers a line of premier coffee machines ready to level up any home kitchen—we also feature top-notch descalers calibrated specifically for our machines. With this duo, you’ll always brew cafe-quality coffee that fuels your passion.
Eager to build the kitchen of your dreams, but unsure where to start? Learn more about Sage’s kitchen appliances today.
Sources:
USGS. Hardness of Water. https://www.usgs.gov/special-topics/water-science-school/science/hardness-water
Lysol.com. What is Hard Water? https://www.lysol.com/clean-and-protect/home-cleaning-tips/cleaning-tips/what-is-hard-water#:~:text=As%20the%20hard%20water%20passes,or%20%E2%80%93%20more%20frequently%20%E2%80%93%20limescale.
Healthy Voyager. What Can Happen If You Don’t Descale Your Coffee Machine.
https://healthyvoyager.com/what-can-happen-if-you-dont-descale-your-coffee-machine/#:~:text=The%20accumulation%20of%20bacteria%20and,coffee%20weaker%20and%20less%20flavorful.
Good Housekeeping. 7 places you should never clean with vinegar.
https://www.goodhousekeeping.com/uk/house-and-home/household-advice/a60211023/places-you-should-never-clean-with-vinegar/
