Descaling Your Coffee Maker With Cream Of Tartar

Quick answer

• Yes, cream of tartar can be used as a natural descaling agent for coffee makers.
• It works by reacting with mineral deposits (like calcium and magnesium) to break them down.
• For best results, use a ratio of about 1-2 tablespoons of cream of tartar per 1 quart (32 oz) of water.
• Run a full brew cycle with the solution, followed by 2-3 cycles with plain water to rinse thoroughly.
• Always check your coffee maker’s manual for specific descaling instructions or manufacturer recommendations.
• Cream of tartar is a food-safe ingredient, making it a popular alternative to commercial descalers.

If you’re looking for a natural descaling agent, cream of tartar is a great option, and you can find it easily online.

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Who this is for

• Home coffee drinkers who prefer natural or DIY cleaning solutions.
• Individuals looking for an affordable and readily available descaling agent.
• Those who want to avoid harsh chemicals in their coffee brewing equipment.

What to check first

Brewer type and filter type

Before you begin descaling, identify your coffee maker’s type. Is it a drip coffee maker, a single-serve machine, an espresso machine, or a pour-over setup? Each might have slightly different descaling considerations. Also, note your filter type. Paper filters are disposable and don’t require descaling themselves, but if you use a permanent metal or cloth filter, ensure it’s clean and free of grounds before running a descaling cycle.

Water quality and temperature

The mineral content of your tap water is a primary reason for descaling. Hard water, rich in calcium and magnesium, will cause scale buildup faster. If your water is particularly hard, you may need to descale more frequently. For the descaling process itself, using room temperature or slightly warm water for the solution is generally effective. The brewing process will heat the water to the necessary temperature.

Grind size and coffee freshness

While not directly related to the descaling solution, ensure you’re using freshly ground coffee for your regular brews. Stale coffee grounds can lead to bitter flavors and contribute to oil buildup in your machine. For the descaling process, you won’t be using coffee grounds, but it’s a good reminder of overall coffee brewing best practices.

Coffee-to-water ratio

When you’re not descaling, the coffee-to-water ratio is crucial for taste. For descaling with cream of tartar, the ratio is about 1-2 tablespoons of cream of tartar per 1 quart (32 oz) of water. This concentration is designed to effectively break down mineral deposits without being overly aggressive.

Cleanliness/descale status

Visually inspect your coffee maker for any obvious coffee grounds or residue in the brew basket, carafe, or water reservoir. If you haven’t descaled in a while, you might notice white or off-white mineral deposits, especially around the heating element or water outlet. This is a clear indicator that descaling is necessary.

Step-by-step (brew workflow)

1. Empty the coffee maker: Remove any old coffee grounds from the filter basket and discard any leftover coffee from the carafe. Rinse the carafe and brew basket.

• What “good” looks like: A clean, empty brew basket and carafe, ready for the descaling solution.
• Common mistake: Forgetting to empty the grounds, which can clog the system and create a mess.

2. Prepare the descaling solution: Fill the water reservoir with 1 quart (32 oz) of water. Add 1 to 2 tablespoons of cream of tartar to the water. Stir gently to help it dissolve.

• What “good” looks like: The cream of tartar is mostly dissolved in the water, creating a slightly cloudy solution.
• Common mistake: Using too much or too little cream of tartar. Too much can be hard to rinse, too little may not be effective. Stick to the 1-2 tbsp per quart ratio.

3. Place a filter: Insert a clean paper filter into the brew basket. This will catch any loose mineral particles that are dislodged during the descaling process.

• What “good” looks like: A clean paper filter sitting properly in the brew basket.
• Common mistake: Forgetting to put a filter in, which can lead to a messy cleanup of dislodged scale.

4. Place the carafe: Position the empty carafe on the warming plate or under the brew basket, just as you would for a normal brew.

• What “good” looks like: The carafe is correctly placed and ready to catch the descaling solution.
• Common mistake: Not ensuring the carafe is securely in place, which could result in a spill.

5. Start a brew cycle: Turn on your coffee maker and let it run a full brew cycle with the cream of tartar solution.

• What “good” looks like: The machine heats the solution and dispenses it into the carafe. You might hear some gurgling or see some foam.
• Common mistake: Stopping the cycle midway. The full cycle is needed to push the solution through the entire internal system.

6. Discard the solution: Once the cycle is complete, carefully discard the hot cream of tartar solution from the carafe. Rinse the carafe thoroughly.

• What “good” looks like: The carafe is empty and free of the descaling solution.
• Common mistake: Not discarding the hot liquid safely, which can cause burns.

7. Run a rinse cycle (first pass): Fill the water reservoir with fresh, clean water. Run another full brew cycle.

• What “good” looks like: The machine dispenses plain water into the carafe.
• Common mistake: Skipping the rinse cycle, which would leave a tart taste in your coffee.

8. Discard rinse water: Discard the plain water from the carafe and rinse it again.

• What “good” looks like: The carafe is clean and ready for the next rinse.
• Common mistake: Not discarding the water, leading to diluted coffee later.

9. Run additional rinse cycles: Repeat steps 7 and 8 at least one to two more times, or until you no longer detect any residual tartness or smell from the cream of tartar.

• What “good” looks like: The water dispensed in the carafe smells and tastes completely neutral.
• Common mistake: Insufficient rinsing. This is the most common cause of coffee tasting off after descaling.

10. Clean removable parts: While the rinse cycles are running, wash the brew basket and carafe with warm, soapy water.

• What “good” looks like: All removable parts are clean and ready to be reassembled.
• Common mistake: Leaving coffee oils or residue on these parts, which can affect taste and hygiene.

11. Reassemble and dry: Once all parts are clean and rinsed, reassemble your coffee maker and allow it to air dry completely before brewing coffee.

• What “good” looks like: A clean, dry, and fully functional coffee maker.
• Common mistake: Not allowing parts to dry, which can lead to mold or mildew.

Common mistakes (and what happens if you ignore them)

Decision rules (simple if/then)

• If your coffee tastes bitter or weak, then descale your coffee maker because mineral buildup can affect brewing temperature and water flow.
• If you notice white, chalky deposits in the water reservoir or on the heating element, then descale your coffee maker because these are signs of mineral scale.
• If you use hard tap water, then descale your coffee maker every 1-2 months because hard water causes scale to build up more quickly.
• If you use soft or filtered water, then you may be able to descale every 3-4 months, but still watch for signs of buildup.
• If your coffee maker is taking longer than usual to brew a pot, then descale your coffee maker because scale can impede water flow.
• If you haven’t descaled your coffee maker in over six months, then descale it now because it’s likely accumulated a significant amount of mineral deposits.
• If you’re unsure about the exact ratio of cream of tartar, then start with 1 tablespoon per quart of water and increase to 2 if needed because effectiveness can vary slightly.
• If you experience any unusual noises or error codes from your coffee maker, then check if descaling is needed because mineral buildup can sometimes interfere with sensor functions.
• If you want to avoid harsh chemicals, then using cream of tartar is a good option because it’s a natural, food-safe ingredient.
• If your coffee maker has a specific descaling cycle, then follow the manufacturer’s instructions first, and use cream of tartar as an alternative if recommended or if you prefer a natural method.
• If you notice a strange smell coming from your coffee maker, then descale it because it could be a sign of mold or mineral buildup.

FAQ

Can I use cream of tartar if my coffee maker manual says not to?

Always prioritize your coffee maker’s manual. If it specifically states not to use any homemade descaling solutions or lists approved descalers, it’s best to follow those recommendations to avoid voiding your warranty or damaging the machine.

How often should I descale my coffee maker?

The frequency depends on your water hardness and how often you use your coffee maker. A general guideline is every 1-3 months for most households. If you have very hard water, you might need to descale monthly.

Will cream of tartar remove coffee oil buildup?

Cream of tartar is primarily effective against mineral scale. For coffee oil buildup, it’s best to use warm, soapy water to clean the brew basket and carafe regularly. Some descaling processes might dislodge loosened oils, but it’s not its primary function.

Is it safe to drink coffee after using cream of tartar?

Yes, as long as you rinse the coffee maker thoroughly with plain water after the descaling cycle. If you don’t rinse properly, your coffee might have a slight tart taste.

Can I use cream of tartar for single-serve coffee makers (like Keurig)?

Many single-serve machines can be descaled using a cream of tartar solution, but always check your specific model’s manual. The process usually involves running the solution through a brew cycle without a pod, followed by multiple rinse cycles.

What if I don’t have cream of tartar?

If you don’t have cream of tartar, white vinegar is another common household descaling agent. However, vinegar can leave a strong odor and taste that is harder to remove. Commercial descaling solutions are also readily available and often specifically formulated for coffee makers.

If you don’t have cream of tartar on hand, you can also opt for a dedicated coffee machine cleaner, which is specifically formulated for the task.

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How do I know if my coffee maker needs descaling?

Signs include a slower brew time, a change in coffee taste (bitter or weak), unusual noises during brewing, or visible mineral deposits in the water reservoir.

What this page does NOT cover (and where to go next)

• Specific descaling instructions for every coffee maker model. (Consult your owner’s manual for model-specific guidance.)
• Detailed information on the chemical reactions of various descaling agents. (For technical details, you might research chemistry resources.)
• Troubleshooting advanced coffee maker malfunctions beyond descaling issues. (Refer to your manufacturer’s support or a qualified repair service for complex problems.)