Is Your Coffee Maker Overflowing? Here's Why.
In Consumer Reports' tests, some coffee makers were more likely than others to overflow
When Consumer Reports began hearing from consumers that their drip coffee makers were overflowing, sometimes spilling hot coffee and grounds onto the counter, we decided to investigate. Were they putting in too much coffee? Too much water? Both?
To get to the bottom of the matter, we added a test to our already challenging battery of brewing performance tests in an effort to duplicate the problem. We filled the filters to within a half-inch of the top, then added the maximum amount of water indicated on the machine. If the owner’s manual specified a maximum amount of coffee, we tried it that way, too.