Run vinegar through your coffee maker like you're brewing coffee, then let it sit and run water through to rinse

Cleaning a coffee maker with vinegar removes mineral buildup (called scale) that collects inside the machine over time, especially if you have hard water. White vinegar is acidic enough to dissolve these deposits without damaging the machine. The process takes about an hour total, though most of that is waiting time, not active work.

You will need white vinegar (the standard 5% acidity kind from any grocery store), water, and a clean mug or carafe to catch the liquid. Do not use apple cider vinegar, balsamic vinegar, or any flavored vinegar — the acid strength is different and flavors can linger in your machine.

Key Takeaways

  • Fill the water reservoir halfway with white vinegar and halfway with water, then run it through as if you were brewing a full pot.
  • Let the vinegar solution sit in the carafe and the machine for 15 to 30 minutes after the brew cycle finishes.
  • Run two full reservoirs of plain water through the machine afterward to rinse out all vinegar smell and taste.
  • Clean your coffee maker with vinegar once a month if you have hard water, or every two to three months if you have soft water.
  • Never soak the heating element or immerse the whole machine in vinegar — vinegar only goes through the water reservoir and brew cycle.

Step-by-step: Running the vinegar cycle

Start with an empty carafe and an empty water reservoir. Pour white vinegar into the reservoir until it reaches the halfway mark. Fill the rest of the way to the top with cold tap water. This 50/50 mix is strong enough to break down scale but not so strong that it damages rubber seals inside the machine.

Place the empty carafe on the warming plate or under the brew outlet. Turn on the machine and let it run a full brew cycle, just as if you were making coffee. The vinegar solution will drip into the carafe. Do not interrupt the cycle — let it finish completely. This usually takes 5 to 10 minutes depending on your machine.

Once the cycle finishes, turn off the machine and pour the vinegar solution from the carafe back into the water reservoir. Do not refill with fresh vinegar — use what just brewed. Place the carafe back underneath and let the machine sit for 15 to 30 minutes. This resting time lets the vinegar dissolve mineral deposits inside the heating element and pipes where you cannot reach by hand.

Rinsing the machine completely

After the vinegar has sat, turn the machine back on and let it run another full cycle. The carafe will fill with mostly vinegar again. Empty the carafe and discard this liquid — do not drink it or reuse it.

Now fill the water reservoir with plain cold water only, no vinegar. Run a full brew cycle and discard what comes out. Repeat this rinsing step one more time with a full reservoir of fresh water. Two rinses are usually enough, but if you smell vinegar strongly when you open the machine, run a third cycle. The goal is to remove all vinegar smell and taste before you brew coffee again.

Cleaning the carafe and filter basket by hand

While the machine is rinsing, wash the carafe with warm soapy water and a sponge or cloth. Pay attention to the bottom and the spout, where old coffee oils collect. Rinse thoroughly under running water.

Remove the filter basket (the part that holds the paper or metal filter) and rinse it under warm water. If it has brown staining or buildup, soak it in a small bowl of the vinegar-and-water solution for 10 minutes, then scrub gently with a soft brush or cloth. Rinse well and let it air dry. Do not put the filter basket in the dishwasher unless your machine's manual says it is safe — some have glued-on parts that heat can damage.

How often to clean with vinegar

If you have hard water (water with high mineral content), clean your machine once a month. Hard water leaves scale much faster than soft water does. You can tell your water is hard if you see white or tan crusty buildup on faucets or inside kettles.

If you have soft water or use filtered water in your machine, clean it every two to three months. Even soft water leaves some mineral deposits over time. If you notice the machine brewing more slowly than usual, or if coffee tastes slightly off, that is a sign scale has built up and a vinegar cleaning is overdue.

Common mistakes that damage the machine

Do not pour vinegar directly into the carafe or onto the heating element. Vinegar must go through the water reservoir and the normal brew cycle — that is the only safe path through the machine. Pouring vinegar anywhere else can damage seals or leave vinegar trapped inside where it will corrode metal parts.

Do not use vinegar that is stronger than 5% acidity, and do not use vinegar straight without diluting it with water. Undiluted vinegar or high-acidity vinegar can eat through rubber gaskets and plastic parts. The 50/50 mix is the right strength.

Do not skip the rinsing step. If you leave vinegar in the machine and brew coffee the next morning, your coffee will taste like vinegar. Two full cycles of plain water rinsing removes the smell and taste completely.

What to do if vinegar smell lingers

If after two rinse cycles you still smell vinegar when you open the machine, run one more full cycle of plain water. Some machines have longer internal pipes where vinegar can hide. A third rinse cycle will reach those spots.

If the smell persists after three water cycles, the vinegar may have gotten into the warming plate or a part you cannot reach. Run the machine empty (no water, no vinegar, no carafe) for 30 seconds, then turn it off and let it cool. Repeat this three times. The heat will help evaporate trapped vinegar. Then run two more full water cycles.

Frequently Asked Questions

Can I use apple cider vinegar instead of white vinegar?

No. Apple cider vinegar has a different acidity level and will leave a strong smell and taste in your machine that is hard to rinse out. White vinegar is the only type that works reliably. It is also cheaper and available everywhere.

What if my coffee maker has a built-in filter or water softener?

Check your machine's manual before using vinegar. Some machines have special filters or cartridges that vinegar can damage. If your manual does not mention vinegar cleaning, contact the manufacturer to ask if it is safe. Many modern machines can handle vinegar, but a few cannot.

Do I need to clean the outside of the machine too?

Wipe the outside with a damp cloth to remove dust and dried coffee splatters. You do not need vinegar for the outside — warm soapy water works fine. The vinegar cleaning is only for the inside water path where scale builds up.

How do I know if my machine needs cleaning before a month has passed?

If the machine brews noticeably slower than it did when new, or if water sits in the reservoir longer before dripping through, scale has built up and a vinegar cleaning will help. You do not have to wait for a calendar date — brew speed is the real signal.

Can I run vinegar through a coffee maker with a permanent metal filter instead of paper filters?

Yes. The vinegar cycle works the same way. After the vinegar sits, remove the metal filter and rinse it under warm water. If it has brown buildup, soak it in the vinegar-and-water solution for 10 minutes, then scrub gently and rinse well before putting it back.