deFOGer - Defogger is a device for clearing condensation from a window, which can also be useful for melting frost, ice, and snow that has collected on the window surface. They commonly exist in automobiles, in two basic varieties. Heating vents can be used to blow warm air over the window surface. Another type, commonly used on a vehicle's rear window, consists of an array of heating elements attached in thin strips to the window interior. This could be a new application of the existing technology!