It is a device that removes the condensed water droplets or ice from the main windscreen, side windows and rear windscreen of a vehicle. This device is also known as 'defroster' or 'demister'. ... Defoggers are typically used during the rainy season.

How does a defogger work?

The front defogger works by channeling warm air through vents aimed directly at your windshield. The rear defogger works by electrical currents through black fibers running through your rear windshield. Both end up serving the same purpose while operating differently.

Where is the defogger in a car?

The front defroster has vents on the dashboard that face the windshield and front windows. The fan and blower motor that operate the heating and air conditioning will also circulate air through these vents to defrost the windows.