How To Clean A Mr. Coffee Coffee Maker | Simple Step-by-Step

Clean your Mr. Coffee coffee maker every 40-80 brews by running a half-vinegar, half-water cycle, then two full fresh water rinse cycles.

Most coffee makers get rinsed but rarely truly cleaned. The mineral buildup from tap water — mostly calcium carbonate — collects inside the reservoir and heating element over time. That thin white film affects more than appearance. It changes how your coffee tastes and how hot the brew gets.

The good news is that cleaning your Mr. Coffee machine takes about half an hour with ingredients you already own. White vinegar and water do the job effectively. The manufacturer recommends tackling this every 40 to 80 brew cycles, depending on your water hardness. Here’s exactly how to do it.

What You Need For The Job

White vinegar — distilled, not cleaning-strength — is the main cleaning agent. Its acetic acid concentration (typically 5%) is strong enough to dissolve limescale but gentle on plastic and rubber components. You’ll also need fresh tap water, the carafe, and a clean filter.

Commercial descaling tablets offer an alternative. Testing from The Kitchn found they performed just as well as vinegar. But vinegar costs less and works for multiple household tasks, making it the practical choice for most people.

A soft cloth or sponge for wiping down the exterior and warming plate is optional but useful. The focus should stay on the internal water path — that’s where deposits hide.

Why Regular Cleaning Matters

Mineral scale doesn’t just look unappealing. It directly affects the brewing process. A machine with heavy buildup takes longer to heat water, and the water may not reach the optimal brewing temperature. The result is coffee that tastes flat or slightly bitter.

• Affects flavor: Mineral deposits can impart a chalky or metallic taste. Coffee oils from old residue also go rancid over time, adding bitterness.
• Slows brew time: Scale narrows the internal tubing, restricting water flow. A clean machine brews at its expected speed.
• Lowers water temperature: Buildup on the heating element insulates it, so water doesn’t get hot enough for proper extraction.
• Shortens machine life: The heating element works harder when coated in scale, which can lead to premature failure over time.
• Signs you need cleaning: Longer brew cycles, visible white residue in the reservoir, or coffee that tastes off are all cues it’s time.

Cleaning frequency varies by water hardness. If you have hard tap water, you might need to descale closer to every 40 brews. Soft water users can stretch toward the 80-brew mark. Check your reservoir for visible residue — that’s your best practical cue.

Step-By-Step Cleaning Routine

Start with an empty machine. Remove any used filter from the basket and empty the carafe. Fill the water reservoir with a solution of equal parts white vinegar and tap water — half vinegar, half water.

Place the empty carafe on the warming plate and start a brew cycle. The vinegar solution travels through the internal tubing, dissolving scale as it goes. Once the cycle finishes, let the machine sit for about 15 minutes with the solution still in the carafe.

Discard the vinegar solution and rinse the carafe. Fill the reservoir with fresh water and run a full brew cycle. Repeat with another full reservoir of fresh water. Per Mr. Coffee’s official guidelines at clean every 40-80 brews, two fresh water rinse cycles are enough to flush out any residual vinegar taste.

Wipe down the warming plate and exterior with a damp cloth while the machine is unplugged. The carafe and filter basket can be washed with mild soap.

That’s the full cleaning cycle. Total time is roughly 30 to 40 minutes, most of it hands-off while the machine runs. The Mr. Coffee support page also offers a video tutorial if you prefer visual guidance.

Vinegar Vs. Commercial Descaler

White vinegar is the traditional household choice, but commercial descalers are specifically formulated for coffee makers. Both work, but they have different trade-offs worth considering.

1. Cost: White vinegar costs pennies per cleaning. Commercial descalers typically cost more per use.
2. Effectiveness: Vinegar dissolves most mineral scale effectively. Commercial descalers may work faster on heavy or stubborn buildup.
3. Residual taste: Vinegar can leave a lingering odor or taste if not rinsed thoroughly. Commercial descalers are often formulated to rinse clean with less aftertaste.
4. Equipment safety: Vinegar is generally safe for standard drip coffee makers. For espresso machines, some experts advise against using vinegar because it can be too harsh on internal seals.

The best choice depends on your water hardness and your tolerance for vinegar smell during cleaning. Both methods produce the same end result — a clean machine and noticeably better-tasting coffee.

After The Clean: Maintenance Tips

Once your machine is clean, simple habits keep it that way longer. Rinse the carafe after each use and wipe the warming plate with a damp cloth to prevent coffee oil buildup. Remove and discard the used filter and grounds immediately after brewing.

Between deep cleans, you can run a water-only cycle once a week to flush out any fresh residue. This is especially helpful if you brew daily. It’s not a replacement for descaling but extends the time between full vinegar treatments.

Some experts advise against using vinegar to clean espresso machines because it can be harsh on seals and leave residual taste. For standard drip coffee makers like Mr. Coffee, it’s considered safe and effective. Tom’s Guide explains the nuance in its vinegar not for espresso article, noting that the machine type makes a real difference in which cleaner suits the job.

Keeping a simple log of cleaning dates — a note on your phone or a sticky note on the machine — helps you stay on schedule without guessing.

The Bottom Line

Cleaning your Mr. Coffee coffee maker every 40 to 80 brews keeps the machine running well and the coffee tasting its best. A half-vinegar, half-water solution followed by two rinse cycles is the recommended method. Commercial descalers work too, but vinegar is simpler and noticeably cheaper.

For stubborn mineral buildup that resists two cleaning cycles, your local water utility can tell you your water hardness level — that number helps you set the right descaling schedule for your specific machine and tap water conditions.