The results were decidedly mixed. When an overflow occurred, the appliance spilled hot coffee onto the counter, sent coffee and grounds around the basket, or deposited grounds in the coffee itself. Also, the overflow could happen at almost any point in the brewing cycle and not just at the end, as you might expect from a full carafe.
We flagged the models that were more prone to spillover in our tests, adding a note to the model page. For example, our top-rated coffee maker, theĀ Cuisinart DCC-T20 Touchscreen 14-Cup Programmable Coffee Maker, didnāt overflow. But another Cuisinart with brewing performance rated Excellent, theĀ Cuisinart DCC-3400 12-cup Programmable Thermal, did overflow occasionally.
The one- and two-mug models we tested performed significantly better. The only one that overflowed was the Kitchen Selectives CM-688, which also earned a subpar score for convenience in our lab tests.
Mary Beth Brault, a spokeswoman for Hamilton Beach, which manufactures coffee makers, says the company tries to troubleshoot when it receives complaints about overflowing. Circumstances that may cause the filter basket to overflow or the coffee maker to brew slowly include excessive amounts of ground coffee or a grind thatās too fine. Or the appliance might need cleaning. āUse slightly less grounds when brewing decaffeinated, flavored, or finely ground coffee,ā she says. āOr use medium-ground coffee.ā
Sometimes itās the filter thatās the problem, Brault says. If youāre using a paper filter, she advises rinsing the filter basket before inserting the paper filter, then making sure itās completely open and in the proper position. And check that you havenāt accidentally used two filters instead of one.
If your coffee maker still overflows after taking these precautions, you may have to resort to brewing smaller amounts to avoid filling the filter basket to the rim. āIf you want a stronger brew, make a smaller batch of coffee,ā says Jim Nanni, associate director of appliance testing at Consumer Reports. āYou just might need to brew additional carafes of fresh coffee. But being the coffee lover that you are, thatās probably a good thing.ā Itās a trade-off, but itās better than having grounds in your last gulp of coffee.
Shopping for a coffee maker?Ā When you compare models in ourĀ full coffee maker ratings and recommendations, look on the model page in the Highs and Lows section for information on whether the ones youāre considering overflowed in our tests. And check out our coffee maker buying guide for more shopping tips.