What Causes the Interior of Car Windows to Always Be Foggy?
2 Answers
Car windows always being foggy on the inside is due to poor quality window film or improper installation. Below are the specific functions of car window film: 1. Good Privacy: Generally, car window film is one-way, which can protect the owner's privacy, but it requires the owner to carefully choose the window film. 2. Anti-Explosion Effect: In case of an accident, the glass with window film will stick together when shattered, preventing the glass from splattering, thus protecting the passengers. 3. Thermal Insulation: High-quality car window film can provide thermal insulation. In summer, it can effectively control the rise of temperature inside the car, and in winter, it can suppress the dissipation of heat inside the car, maintaining the interior temperature and creating a comfortable driving environment for the owner.
When my car windows keep fogging up inside, I've figured out it's mainly due to excessive moisture in the vehicle. For instance, on rainy days or when passengers bring rainwater inside, the humidity in the air tends to condense on the glass, causing fog. This is also common when there's a significant temperature difference, such as using cold AC in summer or heating in winter—the temperature contrast between inside and outside the car causes moisture to accumulate. Additionally, if the AC system isn't set to external circulation, moisture can't escape, leading to issues. Over time, a greasy film might even form on the glass because of smoking while driving or eating in the car, with residues attracting moisture. For prevention, I usually open the windows for a few minutes to ventilate when parking or use the AC's defrost mode. Keeping a dehumidifier bag inside the car is also quite effective, especially during humid seasons. Foggy windows seriously compromise driving safety—poor visibility can lead to accidents—so spending a few minutes each morning to clear them ensures a clear view.
