The Problem
Bitter, “Slow” Coffee If your morning coffee has started to taste metallic or bitter, or if your machine is taking twice as long to brew as it used to, you likely have a “scale” problem. Calcium and mineral deposits from your tap water build up inside the heating elements, acting like insulation that prevents the water from reaching the correct temperature.
The Tip
The Vinegar Flush Once a month, fill your coffee maker’s reservoir with a mixture of half white vinegar and half water. Run a brew cycle halfway, turn the machine off for 30 minutes to let the solution sit, then finish the cycle. Follow this with two cycles of plain water to rinse. Your coffee will instantly taste cleaner, and your machine will run like new.
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The Science
Descaling and Acidity Most tap water contains “hardness” (calcium carbonate). Over time, heat causes this calcium to precipitate and form a rock-hard crust. Vinegar is acetic acid, which reacts chemically with the calcium carbonate to turn it into calcium acetate—a substance that is water-soluble and easily flushes away. This restores the thermal conductivity of the heating element.
The Tool
Natural Coffee Machine Descaler
If you hate the smell of vinegar, the Urnex Dezcal Activated Scale Remover is the professional choice. It’s odorless, biodegradable, and much more powerful at breaking down heavy mineral buildup than standard kitchen vinegar. [Check Price on Amazon – Urnex Dezcal]
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