What is rear window defogger?

A rear window defogger, also known as a heated rear window or rear windscreen defroster, is a device used to clear fog or condensation from the rear window of a vehicle. It consists of a network of electrical heating elements embedded between two layers of the rear window glass. When switched on, an electrical current passes through the heating elements, generating heat that warms the window, causing the fog or condensation to evaporate.

The rear window defogger is typically activated by a button or switch located on the car's dashboard or center console. Once the defogger is turned on, it generates heat to clear the window. Typically, it takes a few minutes for the window to completely clear depending on the weather conditions .

Rear window defoggers are standard equipment on most modern vehicles .They enhance safety by aiding visibility during foggy or wet weather when condensation can easily gather on the rear window, limiting the clear view needed for safe driving.