How to Descale the Keurig K‑Express: Step‑by‑Step from Keurig’s Support Page

Why Descaling Matters

Calcium deposits and scale from water can build up inside the K‑Express and affect taste and performance. Keurig recommends descaling every three months or whenever the descale indicator lights up. Following the manufacturer’s exact procedure keeps the machine running smoothly and extends its life.

Step 1: Prepare the Descaling Solution

1. With the brewer plugged in but powered off, empty the water reservoir.
2. Pour the entire bottle of Keurig Descaling Solution into the empty reservoir.
3. Fill the empty bottle with fresh water and pour it into the reservoir.
4. Place a large ceramic mug on the drip tray.
5. Do not insert a K‑Cup pod.

Source: Keurig Descaling Hub

Step 2: Activate Descale Mode

1. Press and hold the 8 oz and 12 oz buttons together for 3 seconds until the DESCALE light turns solid.
2. When the light flashes, press the 12 oz button (not the BREW button) to start the first descaling brew.

Source: Keurig Descaling Hub

Step 3: Run Descale Cycles

1. After each brew, pour the hot liquid into the sink.
2. Press the flashing 12 oz button again to start the next brew.
3. Repeat until the ADD WATER light illuminates, indicating the machine needs fresh water.

Source: Keurig Descaling Hub

Step 4: Fresh‑Water Rinse

1. Empty the reservoir and rinse the tank.
2. Refill to the MAX fill line with fresh water.
3. When the DESCALE light flashes again, press the 12 oz button to start a rinse brew.
4. Discard the hot liquid after each rinse brew.
5. Continue rinsing until the DESCALE notification turns off.

Source: Keurig Descaling Hub

After Descaling: Clean and Dry the Reservoir

Hand‑wash the reservoir with warm, soapy water. Avoid drying the inside with a cloth, as lint can remain. Let the reservoir air dry before using the machine again.

Source: K‑Express How‑to‑Use Page

Key Differences from Other Keurig Models

• The K‑Express uses the 12 oz button to trigger descaling, not the BREW button used by the K‑Supreme.
• Do not mix the K‑Express procedure with the K‑Supreme or SMART touchscreen descaling paths.

Source: Keurig Descaling Hub

Final Thoughts

By following Keurig’s precise button sequence and rinse steps, you’ll keep your K‑Express running clean and ready for every cup. Remember to descale every three months or when the indicator lights up, and always use the 12 oz button for the K‑Express descaling process.

For more detailed care instructions, see the K‑Express Use & Care Guide PDF.