Empty and rinse the water tank and carafe after each use

The fastest way to keep a Krups coffee maker running well is to empty both the water tank and the carafe while they are still warm, then rinse them under running water. Do this when ready after brewing — dried coffee residue hardens and becomes harder to remove later. Use your hand or a soft cloth to wipe the inside surfaces of the tank and carafe, paying attention to corners where water pools.

For the carafe, a bottle brush or long-handled sponge reaches the bottom easily. The water tank usually sits at the back or side of the machine; slide it out, empty any remaining water, and rinse it thoroughly. Let both air dry before putting them back. This single habit prevents mineral buildup and keeps your coffee tasting fresh.

Key Takeaways

  • Rinse the water tank and carafe with warm water when ready after each use to prevent dried coffee oils and mineral deposits from hardening inside.
  • Run a descaling cycle with white vinegar or a commercial descaler every one to three months, depending on your water hardness, to remove mineral buildup from internal tubes.
  • Wipe the filter basket and brew head with a damp cloth weekly to remove old coffee grounds and oils that can affect taste.
  • Replace the water filter (if your model has one) every two months or according to the manufacturer's schedule to keep water clean and reduce mineral content.

Descale the machine monthly or quarterly with vinegar

Mineral deposits from tap water build up inside the heating element and tubes of your Krups machine over time, slowing water flow and making coffee taste flat. Descaling removes these deposits. Fill the water tank with equal parts white vinegar and water — for example, 4 cups vinegar and 4 cups water for a standard tank. Do not add a filter or coffee grounds.

Place an empty carafe under the brew head and run the machine as if you were making coffee. Let the vinegar solution flow through until the tank is empty, then stop and let the machine sit for 15 to 20 minutes. This allows the vinegar to soak inside the heating element. After the soak, run two full tanks of fresh water through the machine with no vinegar to rinse out the smell and taste.

How often you descale depends on your water. If you have hard water (mineral-heavy tap water), descale every month. If your water is soft, every three months is usually enough. Your Krups manual may include a descaling indicator light that tells you when it is time.

Clean the filter basket and brew head weekly

The filter basket — the part that holds the paper or metal filter and ground coffee — collects old coffee oils and residue. Remove it from the machine and rinse it under warm running water, rubbing the inside with your finger or a soft cloth to remove brown buildup. If it is very stained, soak it in warm water with a drop of dish soap for five minutes, then scrub gently and rinse well.

The brew head is the part directly above the filter basket where water sprays down onto the grounds. Wipe it with a damp cloth or soft brush to remove any dried coffee or grounds stuck to the surface. This takes less than a minute and keeps water flowing evenly over your coffee grounds, which improves the taste of each cup.

Replace the water filter every two months

Many Krups models include a charcoal water filter that sits inside the water tank. This filter removes chlorine and some minerals from tap water before it reaches the heating element. Over time, the filter becomes saturated and stops working, so it needs to be replaced regularly.

Check your machine's manual to find the exact filter model number and replacement schedule — some Krups machines use the AquaFilter, while others use different cartridges. You can order replacement filters online or find them at appliance stores. When you install a new filter, run water through the machine for 30 seconds before making coffee to flush out any loose charcoal particles.

Soak removable parts in hot water for stubborn stains

If the carafe or water tank has brown stains that do not come off with regular rinsing, fill a sink or large bowl with hot water and add two tablespoons of baking soda or white vinegar. Place the stained part in the water and let it soak for 30 minutes to an hour. The stains should soften and wipe away easily with a cloth or sponge.

For very stubborn stains on glass carafes, make a paste of baking soda and water, explore it to the stain, and let it sit for 15 minutes before scrubbing gently with a soft brush. Avoid scouring pads or abrasive cleaners, which can scratch glass or damage plastic parts.

Check the spray head for clogs if water flows unevenly

If water is not spraying evenly over your coffee grounds — for example, if it only comes out of one side — the spray head may be partially clogged with mineral deposits. Run a descaling cycle with vinegar as described above; this usually clears minor clogs. If the problem persists after descaling, use a straightened paperclip or a thin needle to gently poke the small holes in the spray head to dislodge any mineral buildup.

Do this carefully to avoid damaging the plastic. If you are uncomfortable doing this yourself, contact Krups customer service for guidance or take the machine to an appliance repair shop.

Wipe the exterior and check the power cord

Once a week, wipe the outside of your Krups machine with a damp cloth to remove dust and dried water spots. Pay attention to the area around the water tank and carafe, where water often splashes. Dry it with a soft cloth to prevent water marks.

Check the power cord occasionally for cracks or damage. If you see any, stop using the machine and contact Krups for a replacement cord. A damaged cord is a safety hazard and should never be used.

Frequently Asked Questions

Can I use commercial descaler instead of vinegar?

Yes. Commercial descalers made for coffee makers work faster than vinegar and often smell better. Follow the instructions on the bottle — most require you to dilute the descaler with water, pour it into the tank, and run a brew cycle just as you would with vinegar. Rinse the machine with two full tanks of fresh water afterward to remove any remaining descaler taste.

How do I clean the inside of the water tank if I cannot reach it?

Most Krups water tanks are removable and can be rinsed by hand. If yours is built-in, run a descaling cycle with vinegar or commercial descaler — the acidic liquid will clean the inside surfaces as it flows through. For stubborn deposits, let the vinegar solution sit in the tank for 20 minutes before running it through the machine.

What if my coffee tastes bitter or off after cleaning?

You likely have vinegar or descaler residue left in the machine. Run two or three full tanks of fresh water through the machine without any coffee or filter to rinse out the taste completely. Make sure you are using filtered or bottled water if your tap water is very hard, as this can also affect taste.

Is it safe to put Krups parts in the dishwasher?

Check your manual — most Krups carafes and water tanks are dishwasher-safe on the top rack, but some plastic parts may warp in high heat. The brew head and filter basket are usually not dishwasher-safe and should be hand-washed. When in doubt, hand-wash with warm soapy water to be safe.

Do I need to clean my Krups machine if I use filtered water?

Yes, but less often. Filtered water has fewer minerals, so you can descale every four to six months instead of monthly. You still need to rinse the carafe and tank after each use and clean the filter basket weekly, because old coffee oils and grounds build up regardless of water type.