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.

How does window 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.

How do you defog the windows?

When you need the window defogged right away, the fastest way to do so is to rapidly lower the inside temperature so that the moisture stops condensing on the glass. Turning the defrost vent on without heat or opening the windows in cold weather is the fastest way to dissipate the fog on the window.