How to descale a Keurig

First, find your model

The steps really do differ by model, and guides that give one set of buttons for every Keurig get some of them wrong. Look for the name on the front or top of the brewer, or on the label underneath. K-Supreme Plus, K-Slim and K-Mini each have their own steps below. Keurig’s general descaling instructions cover the classic K-Cup home brewers, including the K145 and K155.

Your model, step by step

Checked against Keurig’s own Use and Care guides in October 2026. No pod in the holder for any of these.

K-Supreme Plus

1. Pour the whole bottle of descaling solution into the empty reservoir, then fill the bottle with water and pour that in too. Put a large mug on the drip tray.
2. With the brewer plugged in and switched off, hold the 8oz and 12oz buttons together for 3 seconds. When Brew flashes, press it.
3. Pour the mug into the sink and press Brew again each time, until ADD WATER lights.
4. Empty the reservoir, fill it to MAX with fresh water, and press Brew each time it flashes until the DESCALE notification turns off.

K-Slim

1. Pour in the whole bottle of solution and a bottle of water. Large mug on the tray.
2. With the brewer switched off, hold 8oz and 12oz together for 3 seconds, until the DESCALE light stays solid.
3. Press Brew when it flashes. Pour each mug away and repeat until ADD WATER lights.
4. Fill to MAX with fresh water and press Brew each time it flashes, until ADD WATER lights again. The brewer then leaves descale mode.

K-Mini

1. Switch it on. Pour in a third of the bottle (4.6 oz), then fresh water to the 10 oz line. Lift and lower the handle and press Brew. Pour it away.
2. Do the same again, but switch the brewer off as it starts to dispense. Let it stand for at least 30 minutes.
3. Hold Brew until all the solution has come through, and pour it away.
4. Rinse: three brews or more of 12 oz fresh water, until you can’t taste the solution.

Classic K-Cup home brewers

1. Empty the reservoir, take out any water filter, and turn off Auto Off if yours has it.
2. With the brewer off, pour in the whole bottle of solution and a bottle of water, then switch it back on.
3. Brew the largest size without a pod, pouring each mug away, until Add Water shows. Leave it on and standing for at least 30 minutes.
4. Pour away what’s left, rinse the reservoir, fill it with fresh water and run at least 12 brews of the largest size, refilling as needed.

Your model isn’t here? Keurig publishes a Use and Care guide for each brewer on its support site, with the descale steps near the end. Use that rather than a guide written for a different model.

Can you descale a Keurig with vinegar?

For some brewers, yes, and Keurig says so itself. Its descaling instructions list undiluted white vinegar as a second method for classic home brewers and the old K10 Mini Plus. The newer guides for the K-Supreme Plus, K-Slim and K-Mini name only Keurig’s own solution, so on those, follow the guide.

Keurig’s vinegar method for classic home brewers:

1. Empty the reservoir, take out any water filter and turn off Auto Off if yours has it.
2. Fill the reservoir with undiluted white vinegar to just below the top of the clear window, about 48 oz.
3. Brew the largest size without a pod, pouring each mug into the sink, until it shows Add Water.
4. Leave the brewer on and standing for at least 4 hours.
5. Pour away what’s left, rinse the reservoir well and refill it with fresh water.
6. Brew without a pod until the reservoir is empty. The hot tank still holds vinegar, so run extra rinses if you can taste it.

Vinegar is cheaper; the solution is faster, with half an hour of standing instead of four. Keurig lists both for these brewers, so either is fine there.

When the descale light won’t turn off

• Finish the whole procedure. On the K-Supreme Plus, Keurig says only the full descale, rinse included, turns the notification off. Stopping after the solution leaves it on.
• On a classic brewer, if it still says Descale afterward, Keurig says to repeat the procedure.
• Still brewing only part of a cup after two descales? Keurig’s guides say to call Keurig Customer Service at that point.

Foam, sputtering or almost nothing coming out

Foam is normal: it’s the solution working on the scale. Very little output and the sound of air means the brewer is heavily scaled. Keurig’s fix: turn it off and unplug it, empty and rinse the reservoir, refill with fresh water, plug it back in and run the fresh-water rinse. If it still struggles, leave it unplugged for at least 30 minutes before you carry on rinsing.

While you’re at it: the needles

Grounds in your coffee, or a weak cup after descaling, usually means a clogged needle.

1. Lift the handle and take out the pod holder. Detach its funnel.
2. Push a straightened paper clip into the exit needle in the bottom of the holder to loosen the grounds.
3. Do the same in the holes of the entrance needle under the lid.
4. Put the holder back and run a brew or two of water only.

How often

Keurig says every 3 to 6 months, and every 3 months in the K-Supreme Plus and K-Slim guides, sooner if your water is hard. Keurig suggests bottled or filtered water if you taste minerals or chlorine, but not distilled. In CozyHaus, Descale the coffee machine comes round monthly by default. For a Keurig, set it to every 3 months, which is what Keurig asks for.

Sources

• Keurig, Descaling your Keurig brewer (PDF, classic brewers and the vinegar method)
• Keurig, K-Supreme Plus Use and Care Guide (PDF)
• Keurig, K-Slim Use and Care Guide (PDF)
• Keurig, K-Mini Use and Care Guide (PDF)
• Time and frequency in the app: the CozyHaus chore Descale the coffee machine.

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