What are demisting devices used for?
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Explanation
**Anti-fog devices** are vehicle components designed to **eliminate interior fog** that forms on the windows, especially on the windshield. This fog is caused by the difference in temperature and humidity between the inside and outside of the vehicle, which can impair visibility while driving.
- **Heated rear window**: Although it is mentioned that the heated rear window removes ice and vapors from the rear window, its function is similar to that of anti-fog devices, but applied to the rear window. This indicates that anti-fog devices are intended to improve visibility by eliminating fog from the interior windows.
Therefore, anti-fog devices are essential for maintaining good visibility while driving, ensuring that the windshield and other interior windows are free of fog.
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