Clean your Keurig with vinegar and water to remove mineral buildup and keep it brewing properly
A Keurig needs cleaning in two ways: a daily rinse to clear coffee grounds, and a monthly deep clean to dissolve mineral deposits that clog the water lines. The mineral buildup—called scale—happens because tap water contains calcium and magnesium. Over time, scale slows the water flow, makes brewing take longer, and can stop the machine from heating water hot enough. A full cleaning takes about an hour and costs nothing beyond white vinegar you likely have at home.
The process is straightforward: run vinegar through the machine, let it sit, run water through to rinse, then brew normally. You do not need special descaling solutions, though Keurig sells them. Plain white vinegar works just as well and costs less.
Key Takeaways
- Empty the water reservoir, fill it with white vinegar, and run the brew cycle without a K-Cup to push vinegar through the machine.
- Let the vinegar sit in the machine for 30 minutes after the first brew cycle to break down mineral deposits.
- Run at least two full reservoirs of fresh water through the machine to rinse out all vinegar taste and smell.
- Clean the removable parts—the water reservoir, drip tray, and K-Cup holder—under running water with a damp cloth or soft brush.
- Do a full vinegar clean once a month, or more often if your tap water is hard or the machine brews slowly.
What you need before you start
Gather these items before you begin: a bottle of white vinegar (any brand), fresh water, a damp cloth or soft sponge, and a small brush or old toothbrush. That is all. You do not need descaling powder, special cleaners, or tools beyond what most kitchens have.
Check that your Keurig is unplugged and has cooled for at least 15 minutes. If you just brewed coffee, wait longer. The machine gets hot enough to burn skin, and you will be handling the water reservoir and internal parts.
How to run a vinegar cycle through the machine
Remove the water reservoir by lifting it straight up and away from the machine. Empty any water left inside. Rinse the reservoir under the sink with cool water, then fill it completely with white vinegar—do not dilute it. Slide the reservoir back into place until it clicks.
Place a large mug or cup on the drip tray under the brew spout. Do not insert a K-Cup. Press the brew button for the largest cup size your machine offers (usually 10 ounces or more). The machine will push vinegar through the lines and into your mug. Let it brew all the way through. Discard the vinegar in the mug.
Repeat this step two more times, using fresh vinegar from the reservoir each time. After the third brew cycle, turn off the machine and let it sit for 30 minutes. This resting time lets the vinegar dissolve mineral buildup inside the heating element and water lines where you cannot reach by hand.
Rinse the machine completely with fresh water
After 30 minutes, empty the vinegar from the reservoir. Rinse it thoroughly under running water until you smell no vinegar. Fill the reservoir with fresh, cold water. Place a mug on the drip tray and run a full brew cycle without a K-Cup, just as you did with the vinegar. Discard the water.
Repeat this rinse cycle at least two more times—three total. This removes vinegar taste and smell from the machine. If you still smell vinegar after the third rinse, run one more cycle. Vinegar left inside will make your next cup of coffee taste sour.
Clean the removable parts by hand
While the machine is rinsing, clean the parts you can remove. Take out the water reservoir, the drip tray (the plastic piece that catches spilled water), and the K-Cup holder if your model has one that lifts out. Rinse each under warm running water.
Use a damp cloth or soft sponge to wipe the inside of the reservoir where water sits. Pay attention to the corners and the bottom, where mineral deposits collect as white or gray crusty spots. If spots do not come off with a cloth, use a soft brush or an old toothbrush to scrub gently. Do not use steel wool or abrasive scrubbers—they scratch the plastic.
Wipe the drip tray and K-Cup holder the same way. Rinse everything under clean water and shake off excess water before putting the parts back in the machine.
When to clean and what to do between deep cleans
Do a full vinegar clean once a month if you use your Keurig daily. If your tap water is hard—meaning it has high mineral content—clean it every two weeks instead. You can tell your water is hard if you see white scale buildup on the reservoir or if the machine brews noticeably slower than it used to.
Between deep cleans, rinse the water reservoir every few days and empty the drip tray after each use. After each brew, lift the K-Cup holder and tap out any wet grounds into the trash. These quick steps keep the machine from getting too clogged and make the monthly clean easier.
Common mistakes that damage the machine or leave it dirty
Do not use hot vinegar or heat the vinegar before pouring it in. Cold vinegar works fine and is safer to handle. Do not run vinegar through the machine more than three times in one cleaning session—extra cycles do not clean better and waste vinegar.
Do not skip the rinse cycles. Vinegar left in the machine will make coffee taste bad and can corrode internal parts over time. If you are in a hurry, at least run two full water cycles before you brew coffee again.
Do not use vinegar that is diluted or flavored. Plain white vinegar at full strength is what breaks down mineral deposits. Apple cider vinegar or cleaning vinegar (which is stronger) can damage seals inside the machine.
Frequently Asked Questions
Can I use Keurig's descaling solution instead of vinegar?
Yes. Keurig sells a descaling solution that works the same way as vinegar—you run it through the machine, let it sit, then rinse. It costs more than vinegar and does not clean better. Use whichever you have on hand. Follow the same steps: run the solution through, wait 30 minutes, then rinse with at least two full reservoirs of water.
How do I know if my Keurig needs cleaning?
The machine brews slower than it used to, or the water does not get as hot. You might also see white or gray crusty spots on the inside of the water reservoir. Any of these signs means mineral buildup is blocking the water lines. A monthly clean prevents these problems from starting.
What if vinegar smell stays after rinsing?
Run one or two more full water cycles through the machine without a K-Cup. If the smell persists, brew a cup of coffee and discard it—the coffee grounds can help absorb vinegar smell. The smell will fade after a few normal brews even if you do nothing else, but rinsing more gets rid of it faster.
Is it safe to drink coffee right after cleaning?
Only after you have run at least three full water cycles through the machine. Vinegar left inside will make the coffee taste sour and unpleasant. If you taste vinegar in your first cup after cleaning, run another water cycle and try again.
Can I clean the needle that punctures the K-Cup?
Yes, but carefully. The needle is sharp and straightforward to bend. After you remove the K-Cup holder, look at the needle on the top of the holder and the one on the bottom of the brew head (the part the holder slides into). Use a straightened paperclip or a thin needle to poke out any dried coffee or grounds stuck in the holes. Do this over a sink or trash can so debris falls away. Do not use water—dried grounds come out easier when dry.