Long ago, when we lived in Sonoma County, a woman with whom we had gone to church in San Jose gave us an electric rest warmer. For those not familiar with it, an electric rest warmer is rather like an electric blanket, except that it goes on to the mattress, so that the electric heat is rising up from the bed. I suspect that it is more efficient than electric blanket.
It has dual controls so that you can set the left and right sides of the bed to different temperatures. One of the controls started to give me trouble a few days ago so that the off/on switch would sometimes not stay on. If you pressed it firmly it would temporarily go to on, but not stay on. Sometimes if you pressed it hard it would stay on, but not always.
I decided to figure out what the problem was, so I unplugged it, and then disassembled the control unit. I then noticed the manufacturing date on the control unit: August 15, 1990. This control unit and the rest warmer are more than 22 years old. This is the first problem that it has ever given us. The manufacturer is listed as Chatham Manufacturing Company, Elkin, North Carolina. It also says, "Made in USA."
Once I disassembled it, I discovered that a copper contact had flattened out and only needed to be bent a little bit to solve the problem. It is now working perfectly. Will I get another 22 years of service out of this rest warmer? I do not know, but I'm always so thrilled to see a product that is so durable and reliable. That it is made in the USA just adds to the pleasure.