Empty the pot and remove loose grounds
Start by unplugging the coffee maker and letting it cool for at least 15 minutes if it has been in use. Remove the carafe (the glass pot) from the warming plate and pour out any remaining coffee. If there are grounds sitting in the bottom, rinse them out with warm water.
Next, lift out the filter basket — the plastic or metal holder that sits inside the top of the machine where you place the paper filter. Empty any used grounds and filter into the trash. Rinse the basket under warm running water to remove residual grounds and oils.
Key Takeaways
- Run a mixture of equal parts white vinegar and water through a brew cycle once a month to dissolve mineral buildup inside the heating element.
- The carafe, filter basket, and lid are safe to wash in the dishwasher on the top rack, or by hand with warm soapy water.
- Never submerge the main machine body or heating plate in water — wipe the exterior and plate with a damp cloth only.
- If your coffee tastes bitter or brews slowly, mineral deposits are likely clogging the machine and a vinegar cleaning will restore performance.
Clean the carafe and filter basket
The carafe and filter basket can go in the dishwasher on the top rack, or you can wash them by hand. If washing by hand, use warm soapy water and a soft sponge or cloth. Pay attention to the inside of the carafe where coffee oils build up along the glass — these oils can make fresh coffee taste stale or bitter.
For stubborn stains or old coffee residue stuck to the carafe, fill it halfway with warm water and add two tablespoons of baking soda. Let it sit for 15 to 20 minutes, then scrub with a soft brush or cloth and rinse thoroughly. Dry the carafe and basket with a clean towel before reassembling.
Wipe down the warming plate and exterior
The warming plate — the hot surface where the carafe sits — should never be submerged in water. Instead, unplug the machine, let it cool, and wipe the plate with a damp cloth or soft sponge. If there are dried coffee drips or stains, dampen the cloth with a little warm water and gently rub the spot until it comes clean.
Wipe the outside of the machine body with a damp cloth as well. Pay special attention to the water reservoir area and any crevices where dust or spills collect. Dry everything with a clean towel before plugging the machine back in.
Run a vinegar cycle to remove mineral buildup
Hard water leaves mineral deposits inside the heating element and water lines of your coffee maker. Over time, this buildup slows brewing, makes the machine work harder, and can affect the taste of your coffee. To clean the inside, fill the water reservoir with a mixture of equal parts white vinegar and water — for example, if your reservoir holds 12 cups, use 6 cups vinegar and 6 cups water.
Place an empty carafe on the warming plate. Turn on the machine and let it brew about halfway through a cycle, then turn it off and let it sit for 30 minutes. This allows the vinegar solution to soak inside the heating element. After 30 minutes, turn the machine back on and let it finish the brew cycle. Discard the vinegar mixture from the carafe.
Run two full cycles of plain water through the machine next — no vinegar — to rinse out any remaining vinegar taste or smell. Your coffee maker is now clean. Do this vinegar cleaning once a month if you have hard water, or every two months if your water is soft.
Check the water reservoir for algae or mold
The water reservoir is the plastic tank where you pour water before brewing. If your machine sits unused for a week or more, or if the kitchen is warm and humid, algae or mold can grow inside the reservoir. You may notice a greenish tint or a musty smell when you open the lid.
Remove the reservoir if it is removable on your Hamilton Beach model — many are. Rinse it thoroughly with warm water. If you see visible algae or mold, fill the reservoir with a mixture of one part white vinegar to three parts water, let it sit for one hour, then scrub the inside with a soft brush and rinse well. If the reservoir is not removable, fill it with the vinegar mixture, let it sit for an hour, then run it through a brew cycle without a carafe underneath (have a sink or basin ready to catch the liquid).
Reassemble and run a test brew
Once all parts are clean and dry, reassemble your coffee maker. Insert the filter basket back into the top, place the carafe on the warming plate, and close the lid. Fill the water reservoir with fresh water and run one full brew cycle without any coffee grounds — just water. This final rinse removes any remaining cleaning solution and ensures the machine is ready to use.
After the test cycle, your Hamilton Beach coffee maker is clean and ready to brew. The machine should now brew faster, and your coffee should taste fresher and less bitter than before.
Frequently Asked Questions
Can I use bleach to clean my Hamilton Beach coffee maker?
No. Bleach is too harsh and can damage the plastic and metal parts, and residue can contaminate your coffee. Stick to white vinegar, baking soda, and warm soapy water for safe, effective cleaning.
How often should I clean my coffee maker?
Rinse the carafe and filter basket after each use. Do a full vinegar cleaning once a month if you have hard water, or every two months with soft water. Wipe the warming plate and exterior weekly or as needed.
Why is my coffee maker brewing slowly?
Mineral buildup inside the heating element is the most common cause. Run the vinegar cleaning cycle described above. If it still brews slowly after that, the machine may need professional service or replacement.
Is the carafe safe to put in the dishwasher?
Yes, the glass carafe is dishwasher-safe on the top rack. The filter basket is also safe in the dishwasher. Never put the main machine body or heating plate in the dishwasher.
What if my coffee tastes like vinegar after cleaning?
You did not run enough plain water through the machine to rinse out the vinegar. Run two or three more full cycles of plain water through the machine, discarding each batch, until the vinegar smell is gone.