How to Clean Coffee Maker with White Vinegar | The Right Way

For the full breakdown, see our best Coffee Maker White guide.

White vinegar is the classic descaling agent, but it is not universal. The documented vinegar method is tied specifically to BUNN home brewers, and following it for the wrong machine is how people end up with a ruined appliance. This guide covers the steps that work, why the soak matters, and what to skip.

The Vinegar Descaling Method For BUNN Brewers

The process assumes a reservoir and brew funnel — not a pod machine, not an espresso unit, not a single-serve system.

You will need 1 quart (32 oz) of white vinegar, a toothpick, and dish soap. Here is the documented sequence:

1. Place the empty carafe in position under the brew funnel.
2. Pour the full quart of vinegar into the coffeemaker’s reservoir.
3. Close the lid and let the machine brew. When liquid stops flowing, empty the carafe.
4. Switch the tank OFF and unplug the brewer.
5. Let the vinegar sit for at least 2 hours — this soak is what actually dissolves mineral scale inside the tank and lines.
6. Clean the spray head and its fittings with the toothpick and dish soap, since mineral buildup there restricts flow.

After the soak, plug the brewer back in and run fresh water through it until the vinegar smell is gone. Expect several full cycles.

Why The 2-Hour Soak Is Non-Negotiable

Running vinegar through once and calling it done will not remove the scale. The acid needs contact time to break down calcium deposits clinging to internal surfaces.

Equally important is the rinse phase. Vinegar left in the machine produces a sour taste and smell that ruins your next pot. Run 4 to 5 rinse cycles with fresh water, or continue until you cannot detect any vinegar odor. If you still taste it after the first pot, run another rinse cycle — do not brew coffee yet.

When Vinegar Is The Wrong Choice

Vinegar is not a universal cleaner. Some manufacturers warn that it will damage their machines, while BUNN documents it as the prescribed agent for specific models. The conflict means you should only use vinegar when the manual for your exact brewer says to.

Common mistakes that shorten a brewer’s life:

• Using vinegar on a model that does not specify it in the manual
• Skipping the 2-hour soak that dissolves internal scale
• Running only one rinse cycle and leaving vinegar residue behind
• Ignoring the spray head and fittings where deposits collect
• Letting vinegar sit longer than the documented steps without rinsing

After Cleaning: Get The Most From Your Brewer