Our ~ 5 year old drip coffee maker < Krups brand > suddenly started behaving as if it was partly clogged. Steaming & gurgling & slow.I ran kettle cleaner through it - no change. I ran vinegar through it - no change. I took it apart and the tubes look very clean - no buildup. Other people have said that theirs did exactly the same thing < different brands eg Hamilton Beach > I'm convinced it's a planned obsolescence scenario .. We bought a Braun this time but it's workings look very similar to the rest. John T.