I have a low-end Mr. Coffee standard drip coffeemaker (plastic), because I cannot afford a fancy machine. My problem is since it is plastic when the coffee flows through the machine it comes out tasting stale, like hard water kinda feeling sorta like. It is not the coffee but the machine as the coffee I make is quality. It appears that since this machine is plastic and it runs throughout the tubes inside that I get the flavor of the cheap machine in my mouth. Anybody have any suggestions as I have cleaned it many times.