Listening to the radio as I drove to the coffee shop in the morning, I heard an advertisement that began something like this: “It can be so easy to forget to change your refrigerator filter.” My ears pricked up, because I didn’t realize refrigerators might have filters. What would the filter be filtering? “Just text ‘filter” to 005005 and we’ll send you a new filter every six months!” Didn’t explain much. Is this some kind of scam? “Did you know that if you don’t replace your refrigerator’s filter regularly, it will get clogged with clogged with warm air? Keep your fridge running efficiently! Replace its warm air filter every six months!” But no, it turned out they were talking about replacing water filters for fridges that dispense water and make ice. Our fridge is a boring old fridge that only keeps food cold. If I could get them to come clean the lint out of the radiator coils, that would be worth taking a chance on a phone scam.