How to Descale and Clean Your Coffee Maker

Coffee makers collect mineral deposits from tap water faster than you'd think. Even if your machine brews just fine, invisible calcium and magnesium are building up inside the heating element and tubes—dulling the taste of your coffee and slowing down the brew cycle. A descaled machine runs hotter, faster, and produces better coffee. The process takes about an hour of mostly hands-off time and costs almost nothing. It's the single easiest maintenance task that actually moves the needle on how good your morning cup tastes.

1. Clear the Machine First. Remove any leftover coffee from the carafe and dump out old grounds. Make sure the filter basket is completely empty. Rinse out the carafe with plain water so there's no residual coffee inside.
2. Mix and Fill Reservoir. Pour equal parts white vinegar and cold water into the coffee maker's water reservoir until it's completely full. Use standard 5% distilled white vinegar from any grocery store. Stir it gently if you can access the reservoir opening to ensure the mixture is uniform.
3. Position the Carafe. Set the empty carafe (no filter, no grounds) on the warming plate. Make sure it's seated properly so any liquid flows into it and doesn't spill onto the machine's base.
4. Soak and Brew Cycle. Turn on the coffee maker and let it run for about 5-10 seconds, then turn it off. Let it sit for 15 minutes. This soaks the heating element and internal tubes with the descaling solution, letting the vinegar break down mineral deposits without rushing through. After 15 minutes, turn it back on and let it run until the reservoir is empty.
5. Empty the Carafe. Once the brew cycle completes and the reservoir is empty, carefully pour the hot vinegar solution from the carafe into the sink. Set the carafe back on the warming plate. Don't rinse it yet.
6. Second Soak Pass. If your reservoir still has vinegar solution left in it, leave it there. If it's empty, this step is optional but recommended: fill the reservoir again with the 1:1 vinegar-water solution, start the brew cycle, let it run for 5 seconds, then turn it off and let it sit for another 10 minutes. Run the cycle to completion again. This catches deposits in areas the first pass might have missed.
7. Switch to Fresh Water. Empty any remaining vinegar solution from the reservoir and rinse it out thoroughly with plain water. Fill it completely with fresh cold water. Place the empty carafe back on the warming plate.
8. First Flush Cycle. Start the brew cycle and let it run completely until the reservoir is empty and fresh water fills the carafe. This flushes vinegar residue from the heating element and internal passages. Discard this water—don't drink it.
9. Second Flush Cycle. Refill the reservoir with fresh water again and run a complete brew cycle a second time. Discard this water as well. This ensures any remaining vinegar taste or smell is completely gone from the machine's internal passages.
10. Verify the Result. Add a fresh filter and ground coffee to the basket, fill the reservoir with water, and brew one cup. Smell and taste it carefully. If it tastes clean and not vinegary, you're done. If there's any vinegar aftertaste, run one more water-only cycle.