The basic steps to brew a pot
A Mr. Coffee maker brews by heating water and dripping it through ground coffee into a carafe below. Fill the water reservoir at the back with cold water up to the line that matches how many cups you want to brew. Open the filter basket on top, insert a paper filter, add ground coffee (usually one tablespoon per cup), close the basket, and press the power button. The machine heats the water, drips it over the grounds, and the brewed coffee collects in the carafe. When brewing stops, remove the carafe and pour.
The whole process takes about 10 minutes from button press to finished pot. The heating element stays on as long as the carafe sits on the warming plate, so you can leave it there for a while, though the coffee tastes better fresh. If you want to stop brewing mid-cycle, you can pull the carafe out—the flow will pause—but put it back quickly or coffee will drip onto the warming plate.
Key Takeaways
- Fill the water reservoir to the cup line, add a paper filter and ground coffee to the basket, and press the power button to start brewing.
- Use one tablespoon of ground coffee per cup of water, or adjust to your taste preference.
- The warming plate keeps the carafe hot after brewing stops, but coffee tastes fresher within the first 20 minutes.
- If the machine stops heating or drips very slowly, the heating element or water tube may need cleaning with vinegar and water.
Measuring water and coffee the right way
The water reservoir has cup markings on the side. Fill to the number of cups you want to brew—a "cup" on a coffee maker is about 5 ounces, smaller than a standard mug. If you want a full mug, fill to the 2-cup line. Cold water from the tap works fine; you do not need filtered or distilled water unless your tap water is very hard or has a strong taste.
For the coffee grounds, the standard ratio is one tablespoon per cup of water. If you like it stronger, use one and a half tablespoons per cup. If you like it weaker, use three-quarters of a tablespoon. Measure with an actual tablespoon or use the scoop that came with your machine if it has one. Pre-ground coffee works, but whole beans ground fresh taste noticeably better—grind them just before brewing.
Using the right filter and avoiding grounds in your cup
Mr. Coffee makers use standard paper filters, usually white or brown. They cost a few dollars for a box of 100 and fit into the cone-shaped basket at the top. Slide the filter in so it sits flat against the sides of the basket, then add your ground coffee. If the filter is crumpled or torn, grounds will slip through into the carafe and your coffee will taste gritty.
Some people reuse filters to save money, but paper filters break down after one use and are cheap enough to replace. If you want to avoid paper waste, buy a permanent metal filter designed for Mr. Coffee—they cost $10 to $15 and last years. Metal filters let slightly more coffee oils through, which some people prefer and others find makes the coffee taste heavier. Either way works; it is a taste choice.
Cleaning the machine so it keeps working
Over time, mineral deposits from water build up inside the heating element and water tube, which slows the drip and makes the machine heat unevenly. You will notice the brewing takes longer than usual or stops partway through. To clean it, fill the reservoir with equal parts white vinegar and water, put an empty filter and carafe in place, and run a full brew cycle. Let the vinegar solution drip through completely.
After the vinegar cycle finishes, empty the carafe and reservoir, then run two full cycles with plain cold water to rinse out the vinegar. The machine should smell normal and brew at full speed again. Do this once every one to three months depending on how hard your water is—if you have very hard water, clean more often. Never use vinegar in the carafe itself; only run it through the machine.
Troubleshooting when the machine does not work right
If the machine does not heat at all and the power button does not light up, check that it is plugged in and the outlet works—try plugging in another appliance. If the outlet is fine but the machine still does not turn on, the power cord or heating element has failed and the machine needs replacement; this is not a repair most people do at home.
If the machine heats but water drips very slowly or not at all, the water tube is clogged with mineral buildup. Run the vinegar cleaning cycle described above. If it still drips slowly after two vinegar cycles, the clog is stubborn—let the vinegar solution sit in the reservoir for 30 minutes before running the cycle, or repeat the process the next day. If the machine brews but the carafe does not fill, make sure the carafe is sitting flat on the warming plate and the basket is closed all the way.
Storing and caring for your Mr. Coffee
Keep the machine on a dry counter away from the sink. After each use, empty the carafe and filter basket, rinse them with water, and let them air dry. Wipe the outside of the machine with a damp cloth if it gets dusty. The carafe is usually dishwasher-safe, but hand washing is gentler and makes it last longer.
If you will not use the machine for more than a week, empty the water reservoir completely so stale water does not sit inside. Store the machine in a cabinet or cover it with a cloth to keep dust out. Mr. Coffee makers are straightforward and durable—most last five to ten years with basic care and regular cleaning.
Frequently Asked Questions
Can I use hot water from the tap instead of cold water?
No. Hot tap water may contain sediment or minerals that cold water does not, and the machine is designed to heat cold water to the right temperature. Always fill the reservoir with cold water from the tap.
What if I forget to put a filter in?
The coffee will brew but grounds will fall into the carafe and settle at the bottom. Your coffee will taste gritty and bitter. If this happens, pour the coffee slowly into a cup, leaving the grounds behind, or pour it through a fine strainer into a new cup. Always use a filter.
How long can I leave the carafe on the warming plate?
The warming plate keeps coffee hot for about 30 to 45 minutes, but the taste gets worse the longer it sits. Coffee tastes best within 20 minutes of brewing. After an hour, the coffee tastes burnt and bitter. If you want to keep coffee hot longer, pour it into a thermal carafe instead.
Do I need to descale my Mr. Coffee if I have soft water?
Even soft water leaves some mineral buildup over time, though it happens more slowly. Clean your machine every two to three months with the vinegar cycle. If you have very soft water, you may be able to stretch it to every four months, but regular cleaning keeps the machine working at full speed.
Can I brew with bottled water?
Yes, bottled water works fine and may taste better if your tap water has a strong taste. Distilled water also works, though some people find it makes the coffee taste flat. Tap water is the most common choice and works well for most people.