I'm watching The Streets of San Francisco on the Decades channel. Scene where Karl Malden character's daughter is home from college. She asks how his coffee is and he says it's fine. She knows something is up. He says, "you scrubbed the coffee pot, didn't you?"
"Of course, it looked like no one had since the last time I was here."
"That's because no one had. Scrubbing the coffee pot destroys its character."

Peter