Cleaning Your Keurig K Supreme Coffee Maker

Quick answer

• Descale your K Supreme every 3-6 months, or when the descale light comes on.
• Use a descaling solution or a vinegar/water mix.
• Run multiple rinse cycles with fresh water afterward.
• Regularly clean the drip tray and water reservoir.
• Wipe down the exterior with a damp cloth.
• Check the brew head for clogs.

Who this is for

• Keurig K Supreme owners who want to keep their machine running smoothly.
• Anyone noticing slower brew times or off-tastes in their coffee.
• Folks who want to extend the lifespan of their coffee maker.

What to check first

Brewer type and filter type

This guide is specifically for the Keurig K Supreme. If you have a different model, the steps might vary slightly. Check your manual for specifics.

Water quality and temperature

Use filtered water if your tap water is hard. Hard water causes mineral buildup faster. The machine heats the water itself, so you don’t need to worry about its temperature before brewing.

Grind size and coffee freshness

For K-Cups, the coffee is pre-ground. For reusable pods, a medium grind is usually best. Freshly ground beans make a difference, but for K-Cups, this isn’t an option.

Coffee-to-water ratio

This is less of a concern with K-Cups as the machine dispenses a set amount of water. If using a reusable pod, experiment with 1-2 tablespoons of coffee per 6 oz of water.

Cleanliness/descale status

Look for the “Descale” light. If it’s on, it’s time for a deep clean. Even if it’s off, regular cleaning prevents buildup.

Step-by-step (how to clean a Keurig coffee maker K Supreme)

1. Turn off and unplug the machine.

• What “good” looks like: The machine is completely powered down and safe to handle.
• Common mistake: Trying to clean a plugged-in machine. Always unplug for safety.

2. Remove and empty the water reservoir.

• What “good” looks like: The reservoir is completely empty and ready for cleaning solution.
• Common mistake: Leaving water in the reservoir. This dilutes your cleaning solution.

3. Prepare the descaling solution.

• What “good” looks like: You have either a commercial descaling solution mixed according to package directions or a 1:1 mix of white vinegar and water.
• Common mistake: Using harsh chemicals or abrasive cleaners. Stick to Keurig-approved solutions or vinegar.

For the best results, consider using a dedicated Keurig K Supreme descaling solution, which is formulated to effectively remove mineral buildup without harming your machine.

Roobi Keurig Compatible Descaling Solution. Specially Formulated for Descaling & Cleaning. 2 Uses per Bottle, 2 Pack. Carbon Neutral Keurig Descaling Kit.

• CLEANER & DESCALER FOR KEURIG - The descaling process removes any mineral build-up and limescale, keeping your machine running smoothly and producing perfect coffee each time. The eco-friendly, odorless formula is safe for your environment and Increases the life of your machine.
• INCREASES LIFE OF MACHINE - Descaling not only improves the taste of your coffee, but it also extends the life of your machine. By using our solution regularly, you can keep your Keurig coffee maker running like new for years to come.
• ODOR FREE - Unlike some other descaling solutions, ours doesn't produce any unpleasant odors. In fact, you'll be pleasantly surprised by how fresh your coffee tastes after using our cleaner!
• ENVIRONMENTALLY SAFE - Our Keurig descaling solution is specially formulated to clean and descale your machine while being eco-friendly. It's safe for your environment and will leave your Keurig with a fresh, new taste.
• 2 BOTTLES, 4 USES - This package comes with 2 bottles of Keurig descaling solution, for a total of 4 uses. It can be used in any model of Keurig machines.

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4. Fill the reservoir with the descaling solution.

• What “good” looks like: The reservoir is filled to the “Max Fill” line with your chosen cleaning liquid.
• Common mistake: Overfilling the reservoir, which can cause spills during the brewing cycle.

5. Place a large mug (at least 10 oz) on the drip tray.

• What “good” looks like: The mug is securely positioned to catch the cleaning solution.
• Common mistake: Using a small mug. You need a big one to catch all the solution.

6. Run a brew cycle without a K-Cup.

• What “good” looks like: The machine pumps the solution through. Select the largest brew size (e.g., 10 oz).
• Common mistake: Forgetting to remove the K-Cup if you were using one. This can clog the machine.

7. Discard the hot liquid and rinse the mug.

• What “good” looks like: The dirty liquid is safely poured down the drain.
• Common mistake: Not discarding the liquid. You want to flush the system, not re-brew the cleaner.

8. Repeat steps 5-7 until the reservoir is empty.

• What “good” looks like: All the descaling solution has been run through the machine.
• Common mistake: Stopping too soon. You need to run the full batch to get the cleaner through all the internal parts.

9. Rinse the water reservoir thoroughly.

• What “good” looks like: All traces of the cleaning solution are washed away.
• Common mistake: Not rinsing well. You don’t want your coffee to taste like vinegar or cleaner.

10. Fill the reservoir with fresh, filtered water.

• What “good” looks like: The reservoir is filled to the “Max Fill” line with clean water.
• Common mistake: Using tap water for rinsing if your tap water is hard. Filtered water is best.

11. Run multiple brew cycles with just water.

• What “good” looks like: You run at least 3-4 full brew cycles (or until the descale light turns off) to flush out any remaining solution. Select the largest brew size.
• Common mistake: Not running enough rinse cycles. This is crucial to get rid of any lingering cleaning taste.

12. Clean the drip tray and exterior.

• What “good” looks like: The drip tray is washed, and the outside of the machine is wiped down with a damp cloth.
• Common mistake: Neglecting the exterior and drip tray. They can get gunky too.

Common mistakes (and what happens if you ignore them)

Decision rules (simple if/then)

• If the “Descale” light is on, then you must descale the machine because it indicates mineral buildup.
• If your coffee tastes bitter or weak, then try descaling the machine because buildup can affect extraction.
• If you use your machine daily, then aim to descale every 3 months because more frequent use means faster buildup.
• If you have very hard tap water, then always use filtered water in your reservoir because it significantly slows mineral accumulation.
• If you notice slower brew times, then descale the machine because a clog is likely forming.
• If you’re using a reusable pod and coffee is flowing too slowly, then check your grind size and ensure it’s not too fine.
• If you smell a musty odor from the machine, then clean the water reservoir and drip tray thoroughly because mold can grow in stagnant water.
• If you’re unsure about a specific cleaning product, then stick to Keurig’s recommendations or the vinegar/water method because other chemicals can damage the machine.
• If you’ve just descaled and your coffee still tastes off, then try running another full rinse cycle because you might not have flushed all the cleaner out.
• If the brew head seems clogged, then use a straightened paperclip to gently clear any blockages after unplugging the machine.

FAQ

How often should I descale my Keurig K Supreme?

Keurig recommends descaling every 3-6 months, or whenever the “Descale” light comes on. Heavy use or hard water can mean you need to descale more often.

Can I use regular vinegar to descale my Keurig?

Yes, a mixture of 1 part white vinegar to 1 part water is a common and effective descaling solution if you don’t have a commercial descaling product. Just make sure to rinse thoroughly afterward.

What happens if I don’t descale my Keurig?

Over time, mineral deposits can clog the internal components, leading to slower brewing, weaker coffee, and eventually, machine failure. It can also affect the taste of your coffee.

How do I clean the reusable K-Cup filter?

After each use, empty the coffee grounds and wash the reusable filter with warm, soapy water. You can also run it through a dishwasher cycle occasionally, but handwashing is often best for longevity.

Is it safe to drink coffee after descaling?

Yes, as long as you run multiple rinse cycles with fresh water afterward. This ensures all traces of the descaling solution are flushed out.

My “Descale” light won’t turn off after cleaning. What should I do?

You might need to run more rinse cycles, or the light might need to be reset manually. Check your K Supreme’s user manual for specific instructions on resetting the descale indicator.

How do I clean the K-Cup holder?

The K-Cup holder assembly can usually be removed. Wash it with warm, soapy water, rinse, and dry thoroughly before reinserting it into the machine.

What this page does NOT cover (and where to go next)

• Detailed troubleshooting for specific error codes (check your manual).
• Advanced brewing techniques for reusable pods (like specific grind sizes for different coffee types).
• Replacing internal machine parts (contact Keurig support for repairs).
• Cleaning other Keurig models (steps may vary).