(Nano)tech support

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Please key in the model and serial number of the product you are calling about. The model number is the series of 12 letters and digits that is visible when you push the unit away from the wall, work your head into the gap using a crowbar and No. 10 machine oil, and train a beam of ultraviolet light on the lower three centimeters of the right-hand rear surface of the appliance. If the model number is obscured by dust or cockroach detritus, wipe it with a soft, lint-free cloth soaked in a solution of ordinary rubbing alcohol, Kirschwasser, and formaldehyde. The serial number is the 37-digit number inscribed by means of laser nanotechnology on the underside of the unit and is not visible to the naked eye. When you have entered both numbers, press the pound key. More here