Why new cars fog up faster than old ones—and the one trick that actually works

[Kamaji]

Why new cars fog up faster than old ones—and the one trick that actually works

David Foster
December 23, 2025

[Courtesy of Gemini] It is frustrating when your windshield fogs up or freezes on a cold winter evening while other cars are unaffected, especially if your vehicle is only 18 months old. In most cases, the cause is not a mechanical defect but moisture inside the cabin or small differences in climate control settings, which can be addressed with proper ventilation and dehumidification practices.

[Courtesy of Gemini] Winter windshield fogging is primarily caused by excess moisture trapped inside the cabin. Snow or rain carried in on shoes can soak floor mats, and when the heater is running this moisture evaporates and raises interior humidity. Damp items like umbrellas, towels, or car wash supplies can worsen the problem, and modern vehicles with tight sealing often trap this moisture inside instead of letting it escape.

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Source:  https://autopostglobal.com/latest-scoops/photo-report/article/86712/

[Wingnut]

The old "One Trick" canard!