Tips for Removing Plastic Smell From Coffee Makers

Quick answer

• Boil water through the machine a few times.
• Use a vinegar or citric acid solution for deeper cleaning.
• Run a few cycles with just water afterward.
• Check for any removable plastic parts that might be the culprit.
• Air out the machine thoroughly.
• If the smell persists, it might be time for a new one.

What this problem usually is (and is not)

This issue is almost always about new materials off-gassing. It’s common with brand-new coffee makers, especially those with a lot of plastic components. It’s not usually a sign of the machine breaking or a dangerous malfunction. We’re just trying to get rid of that initial “new appliance” scent. Don’t stress about it, we’ll get this sorted.

Likely causes for how to get rid of plastic smell in coffee maker

Water System:

• New Components: A brand-new machine will have manufacturing residues. Run a few cycles with just water to flush them out.
• Hard Water Buildup: Over time, mineral deposits can trap odors. Descale the machine to see if that helps.

Coffee & Filter:

• Old Coffee Grounds: Leftover grounds can get moldy and smelly. Always clean out the basket after brewing.
• Stale Coffee: Coffee itself can go rancid, and that smell can linger. Use fresh beans.

Filter Basket & Carafe:

• Plastic Carafe: Some carafes can retain smells more than others. Make sure it’s thoroughly cleaned and aired.
• Filter Holder: This part can also trap odors. Give it a good scrub.

Machine Setup & External Factors:

• Storage Odors: If the machine was stored in a dusty or smoky area, it can pick up smells. Air it out.
• Environmental Smells: Sometimes, strong kitchen odors can cling to the plastic.

Fix it step-by-step (brew workflow)

1. Unplug and Inspect: Unplug the machine. Look for any obvious plastic parts that seem loose or damaged.

• Good: Everything looks solid and clean.
• Mistake: Ignoring a loose part that could be causing the issue.

2. Initial Rinse Cycle: Fill the water reservoir to the max line with fresh, cold water. Place the empty carafe under the brew basket. Run a full brew cycle without coffee grounds or a filter.

• Good: The machine runs, and water fills the carafe.
• Mistake: Forgetting to run it with just water first. This is key for new machines.

3. Repeat Rinse Cycles: Discard the water. Repeat step 2 at least 2-3 more times until the water coming through smells neutral.

• Good: The water coming out smells cleaner with each cycle.
• Mistake: Stopping after just one rinse.

4. Prepare a Cleaning Solution: Mix equal parts white vinegar and water, or use a dedicated coffee maker descaling solution according to its package directions. For a citrus clean, dissolve 1-2 tablespoons of citric acid powder in a full reservoir of water.

• Good: You have a clear or slightly cloudy cleaning liquid.
• Mistake: Using harsh chemicals not meant for coffee makers.

5. Brew Cleaning Solution: Pour the cleaning solution into the water reservoir. Place the empty carafe under the brew basket. Run a full brew cycle.

• Good: The machine brews the cleaning solution.
• Mistake: Not running a full brew cycle.

6. Let it Sit (Optional): For stubborn smells, after brewing the cleaning solution, let the machine sit for 30-60 minutes with the solution still in the reservoir and carafe.

• Good: You’re giving the cleaner time to work on any lingering residue.
• Mistake: Skipping this if the smell is still noticeable after the first brew.

7. Discard and Rinse: Discard the cleaning solution from the carafe. Rinse the carafe and brew basket thoroughly with warm, soapy water.

• Good: All cleaning solution residue is washed away.
• Mistake: Not rinsing the carafe and basket well.

8. Final Water Rinses: Fill the reservoir with fresh, cold water. Run at least 2-3 full brew cycles with just water.

• Good: The water coming out is clear and has no residual vinegar or cleaning solution smell.
• Mistake: Not running enough plain water cycles to flush out the cleaner.

9. Air Out: Leave the water reservoir lid open and the carafe out of the machine for several hours, or overnight, in a well-ventilated area.

• Good: The machine is completely dry and aired out.
• Mistake: Putting everything back together immediately.

10. Test Brew: Run one final brew cycle with just water to ensure all odors are gone before brewing coffee.

• Good: The final water run is completely odorless.
• Mistake: Brewing coffee if you still detect any plastic smell.

Prevent it next time

• Clean Regularly: Wipe down the exterior and clean the brew basket and carafe after every use.
• Descale Periodically: Use a descaling solution or vinegar mix every 1-3 months, depending on water hardness and usage. Check your manual for specific recommendations.
• Use Filtered Water: This reduces mineral buildup and can improve taste.
• Fresh Coffee: Always use fresh, whole beans and grind them just before brewing.
• Proper Filter Use: Ensure you’re using the correct filter type and size for your machine.
• Air It Out: If you won’t be using the machine for a while, leave the lid open and carafe separate to prevent stagnant air.
• Inspect for Damage: Periodically check for any cracks or damage to plastic components.
• Avoid Harsh Cleaners: Stick to manufacturer-recommended cleaning methods.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Not running initial water cycles	Persistent plastic smell, especially in new units	Follow the step-by-step guide to flush out manufacturing residues.
Using harsh chemicals for cleaning	Damage to internal components, unsafe residue	Use only vinegar, citric acid, or manufacturer-approved descalers. Always rinse thoroughly.
Not rinsing thoroughly after descaling	Vinegar or cleaning solution taste in coffee	Run at least 2-3 full brew cycles with fresh water after using any cleaning solution.
Leaving old coffee grounds in basket	Mold, mildew, and bad smells	Clean the brew basket and carafe immediately after each use.
Using stale or low-quality coffee	Off-flavors and lingering odors	Invest in fresh, whole bean coffee and grind it just before brewing for the best taste and aroma.
Not descaling regularly	Mineral buildup, slow brewing, bad taste	Follow the descaling schedule recommended in your manual (typically every 1-3 months).
Storing the machine in a smelly area	Coffee maker absorbs external odors	Store your coffee maker in a clean, dry, well-ventilated spot. Air it out before brewing if it’s been stored for a while.
Ignoring a persistent smell	Compromised brewing experience, potential health concern if mold is present	If cleaning doesn’t work, the plastic itself might be faulty or degraded. Consider replacing the unit.
Using tap water with high mineral content	Faster scale buildup, potential taste issues	Use filtered or bottled water to extend the life of your machine and improve coffee quality.
Not airing out the machine	Trapped moisture and stagnant odors	Leave the lid open and carafe separate when not in use, especially after cleaning, to allow air circulation and drying.

Decision rules (simple if/then)

• If the smell is only present when the machine is new, then run multiple plain water brew cycles because manufacturing residues need flushing.
• If the smell persists after plain water cycles, then use a vinegar or descaling solution because deeper cleaning is required.
• If you can still smell vinegar after cleaning, then run more plain water cycles because the cleaning solution needs to be fully rinsed out.
• If the smell is like burnt plastic, then unplug the machine immediately and check for any signs of damage or overheating because this could be a safety issue.
• If the smell is only in the coffee and not the machine itself, then check your coffee beans and grind because stale coffee can go rancid.
• If the smell is faint and only noticeable when brewing, then ensure your filter is seated correctly because a poor seal can affect brewing and airflow.
• If you have hard water and haven’t descaled in months, then descale the machine because mineral buildup can trap odors.
• If the smell is coming from the carafe, then soak it in a baking soda and water solution because carafes can absorb strong smells.
• If the smell is still there after all cleaning and airing, then the plastic components might be compromised and it’s likely time for a new coffee maker.
• If you’re unsure about a specific cleaning product, then consult your coffee maker’s manual because they often have specific recommendations.

FAQ

Q: Is the plastic smell dangerous?

A: Generally, a faint plastic smell from a new appliance is not dangerous, but it’s not ideal for your coffee. If the smell is strong or accompanied by smoke, unplug it immediately.

Q: How often should I descale my coffee maker?

A: This depends on your water hardness and how often you use it. A good rule of thumb is every 1-3 months. Check your manual for specifics.

Q: Can I use bleach to clean my coffee maker?

A: No, absolutely not. Bleach is too harsh and can damage your machine and leave unsafe residues. Stick to vinegar or descaling solutions.

Q: My coffee tastes like plastic, what’s wrong?

A: This usually means the plastic smell hasn’t been fully removed from the brewing path. Try running more cleaning cycles with plain water.

Q: I have a Keurig. How do I get rid of plastic smell?

A: For single-serve brewers, the process is similar. Run multiple cycles with just water, then a cycle with a vinegar/water mix, followed by more water cycles. Make sure to clean the needle assembly too.

Q: Does the type of plastic matter?

A: BPA-free plastics are generally considered safer, but even they can have an initial off-gassing smell. The cleaning process helps regardless of the specific plastic type.

Q: Can I just ignore the smell if it’s faint?

A: While you might be able to, it’s best to address it. That smell can transfer to your coffee and indicates residues that might not be great to ingest.

Q: What if my carafe smells like plastic?

A: Try soaking it in a mixture of warm water and a few tablespoons of baking soda for a few hours. Then wash it thoroughly.

Q: My coffee maker is old, but now it smells like plastic. What now?

A: This could indicate that the plastic components are degrading over time. Try a deep clean, but if the smell persists, it might be time for a replacement.

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

• Specific troubleshooting for individual coffee maker brands and models. (Check manufacturer’s website or manual).
• Repairing broken plastic components. (Contact manufacturer or a repair service).
• Advanced coffee brewing techniques. (Explore barista guides or coffee forums).
• Selecting the best coffee beans for your taste. (Visit specialty coffee roaster websites).
• Electrical safety beyond basic unplugging. (Consult an electrician for electrical issues).