How to Descale a Keurig K-Supreme: Step-by-Step Guide

How to Descale a K-Supreme in About 20 Minutes

On the K-Supreme and K-Supreme Plus, descaling starts with the brewer plugged in and powered off. Hold 8oz + 12oz for 3 seconds. Pour in a full bottle of Keurig Descaling Solution plus a bottle of water, brew it through until ADD WATER, then rinse with fresh water until the DESCALE notification turns off. The K-Supreme SMART does the same job from its screen: Settings → Descale Mode, or CONTINUE on the descale notification.

The notification only clears when the full procedure finishes, rinse included. There's no button combination that turns it off on its own.

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What You Need

Before you start: take out any pod, and remove the water filter from the reservoir if you use one.

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Step 1: Empty the Reservoir and Remove the Filter

1. Lift off the reservoir and empty it.
2. Take out the Keurig Water Filter, if fitted.
3. Check there's no pod in the pod holder.

Time: 1 minute
Difficulty: Easy

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Step 2: Enter Descale Mode

1. K-Supreme and K-Supreme Plus: with the brewer plugged in and powered off, press and hold 8oz + 12oz for 3 seconds.
2. K-Supreme SMART: when the Descale notification appears, press the left arrow and choose CONTINUE, then pick your product (2 oz pouch or 14 oz bottle). No notification? Press both arrows to open Settings and select Descale Mode.

Time: 1 minute
Difficulty: Easy

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Step 3: Add the Descaler

1. Pour the entire bottle of Keurig Descaling Solution into the empty reservoir.
2. Fill the empty bottle with water and pour that in too. (SMART with the pouch: add 24 oz / 3 cups of water.)
3. Put the reservoir back and seat it properly.
4. Place a large ceramic mug on the drip tray.

Time: 2 minutes
Difficulty: Easy

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Step 4: Brew the Solution Through

1. Press the flashing brew button. (SMART: it dispenses 12 oz of hot water.)
2. Empty the mug into the sink and put it back.
3. Repeat until the reservoir is empty and the brewer shows ADD WATER.

Time: Part of the 15-20 minutes
Difficulty: Easy

Foam during descaling is normal. Keurig says it's the solution reacting with the scale.

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Step 5: Rinse Until the Notification Clears

1. Rinse the reservoir and fill it with fresh water to the MAX line.
2. Put the mug back and press the flashing brew button.
3. Pour each mugful away.
4. Repeat until the DESCALE notification turns off. (SMART: until the screen says DESCALE COMPLETE.)
5. Refit the water filter.

Time: Part of the 15-20 minutes
Difficulty: Easy

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If It Stops Filling (Heavily Scaled Brewer)

Keurig's guides describe this: on a heavily scaled brewer, after the descaler goes in you may see "little to no output dispensed, followed by the sound of air blowing out".

1. Turn the brewer off and unplug it.
2. If descaler is still in the reservoir, pour it away, rinse the reservoir thoroughly and refill with water.
3. Plug back in, power on and repeat the fresh-water rinse.
4. If it persists, leave the brewer unplugged for at least 30 minutes before continuing the rinse.

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When to Descale

• Every 3 months, according to the K-Supreme guides.
• Whenever the descale notification appears. Keurig says it may build up faster depending on the minerals in your water.
• After storage. The SMART guide recommends rinsing the reservoir and descaling after the brewer has been stored.

Keurig links descaling to the heater: it "helps maintain the heating element and other internal parts that come in contact with water".

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Descale Notification Won't Clear?

• Finish the rinse. On the K-Supreme the notification turns off during the fresh-water rinse. On the SMART, keep rinsing until DESCALE COMPLETE.
• Repeat the whole procedure if you stopped part-way.
• Partial cups after descaling twice? The guides say to contact Customer Service.

More: Keurig descale light won't turn off.

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FAQ

How do I put my Keurig K-Supreme in descale mode?

With the brewer plugged in and powered off, hold the 8oz and 12oz buttons together for 3 seconds. On the K-Supreme SMART, use the Descale notification or Settings → Descale Mode instead.

How long does descaling a K-Supreme take?

About 15-20 minutes, according to the guides, plus extra rinses if the notification hasn't cleared.

Can I descale a K-Supreme with vinegar?

The K-Supreme guides call for Keurig Descaling Solution and don't offer vinegar as an alternative.

Why does my K-Supreme make an air sound during descaling?

Keurig describes it as a sign of a heavily scaled brewer. Turn it off, unplug it, rinse the reservoir, and repeat the fresh-water rinse. If it continues, leave it unplugged for at least 30 minutes.

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Related Keurig Guides

• Keurig Descale Light Won't Turn Off?
• Keurig K-Supreme Not Heating?
• K-Supreme SMART Messages
• Keurig Water Filter Replacement

Sources: Keurig Use & Care Guides for the K-Supreme, K-Supreme Plus and K-Supreme SMART.