How to Clean a Coffee Maker

That cup of coffee doesn’t taste as good as it used to? Your coffee maker might be the problem. Over time, coffee oils, mineral scale, and residue build up inside the machine — affecting both the flavor of your coffee and the lifespan of the appliance.

Cleaning a drip coffee maker is simple, takes about 30 minutes, and only requires ingredients you probably already have.

Why Your Coffee Maker Needs Cleaning

Every time you brew, the machine leaves behind:

• Coffee oils — these go rancid and add a bitter, stale taste.
• Mineral scale — calcium and lime deposits from water, especially hard water.
• Bacteria and mold — can grow in the reservoir and carafe if left damp.

These build up over time, which is why even fresh, expensive coffee can taste bad from a dirty machine. Regular cleaning fixes this.

What You’ll Need

• White vinegar (or citric acid)
• Water
• A soft cloth or sponge
• Dish soap for the removable parts

Step-by-Step: How to Clean a Drip Coffee Maker

Step 1: Prep the Machine

1. Unplug the coffee maker.
2. Remove the carafe and the filter basket.
3. Wash these removable parts in warm, soapy water and rinse well.

Note: Don’t put the carafe in the dishwasher unless the manual says it’s dishwasher-safe.

Step 2: Descale with Vinegar

Vinegar dissolves the mineral scale that builds up inside the machine.

1. Fill the reservoir with equal parts white vinegar and water (for a standard 10-12 cup machine, use about 4 cups of each).
2. Place an empty carafe back in place (no coffee, no filter).
3. Run a full brew cycle — let the vinegar solution pass through the machine.

Step 3: Let It Sit

1. After the brew cycle, let the machine sit for 30 minutes with the vinegar solution in the carafe and reservoir. This gives the vinegar time to break down scale.
2. For very hard water, you can let it sit for up to an hour.

Step 4: Rinse Thoroughly

The vinegar smell and taste must be completely removed.

1. Empty the carafe and refill the reservoir with plain water.
2. Run 2-3 full brew cycles with plain water only.
3. Discard the water each time.

⚠️ Important: If you can still smell vinegar, run more plain-water cycles. Nobody wants vinegar-flavored coffee.

Step 5: Final Wipe-Down

1. Wipe the exterior with a damp cloth.
2. Clean the carafe plate (the hot surface underneath) and any coffee-stained areas.
3. Dry all removable parts before reassembling.

Alternative: Clean with Citric Acid

If you prefer not to use vinegar, citric acid (available in powder form at most grocery stores) is a highly effective descaler.

1. Dissolve 2-3 tablespoons of citric acid in a full reservoir of warm water.
2. Run a brew cycle, let it sit for 30 minutes, then rinse with 2-3 plain-water cycles.

How to Clean a Keurig or Single-Serve Machine

Single-serve pod machines need similar care:

1. Remove the water reservoir and wash it with soapy water.
2. Fill the reservoir with equal parts vinegar and water.
3. Run a brew cycle without a pod (put a mug underneath).
4. Let it sit for 30 minutes.
5. Run 2-3 cycles of plain water to rinse.
6. If your machine has a removable needle/piercer, clean it with a paper clip (carefully, per the manual).

How Often Should You Clean It?

After every use: Wash the carafe and filter basket to prevent oil buildup.

Tips to Keep Your Coffee Tasting Great

• Use filtered water — less scale means fewer descaling sessions.
• Always empty the carafe — don’t leave coffee sitting on the hot plate.
• Leave the lid open to dry after washing, so mold doesn’t form.
• Replace the paper filter or clean the reusable filter after every brew.
• Follow your manual — some machines have specific cleaning instructions.

The Bottom Line

Descaling your coffee maker every 1-3 months with vinegar and water is one of the easiest, cheapest ways to keep your coffee tasting fresh and extend the life of your machine. The whole process takes about 30 minutes and costs just pennies.

For more kitchen cleaning help, see our guide on how to clean a burnt pan.