Why can't the foggy front windshield be wiped clean?
2 Answers
The foggy front windshield that cannot be wiped clean may be caused by damage to the car window film, and it is necessary to have it inspected and repaired as soon as possible. Below is relevant information about car window film: 1. Introduction: Car window film involves applying a thin film-like material to the front and rear windshields, side windows, and sunroof of a vehicle. This film is also known as solar film or heat-insulating film. 2. Function: It mainly blocks ultraviolet rays, reduces heat, prevents injuries from shattered glass, and reduces glare. Additionally, due to the one-way transparency of the solar film, it helps protect personal privacy. 3. Principle: High-heat-insulating metal film layers are created through vacuum deposition or magnetron sputtering technology, using metals such as aluminum, gold, copper, and silver. The outer shell electrons (free electrons) in the metal materials are generally not bound by the atomic nucleus. When exposed to light waves, the electric field of the light waves causes the free electrons to absorb the light's energy, producing oscillations at the same frequency as the light. These oscillations then emit light at the same frequency as the original light, which is known as light reflection.
I've encountered the issue of a hazy front windshield that won't wipe clean several times. At first, I thought it was just dirt that wasn't cleaned properly, but later I realized it was an oil film buildup on the outside, just like kitchen grease sticking to glass—hard and stubborn. The main causes are oil and dust splashing onto the glass while driving on highways or parking near restaurant exhaust areas. I tried cleaning it with water, which didn't work, and even dish soap foam failed to remove it. In the end, I had to go to a car wash where they used professional oil film remover to fix it. After cleaning, the windshield was crystal clear, making driving much safer. If the oil film is too thick, the glass can become blurry, severely affecting visibility, especially during rain or at night, which increases the risk of accidents. I think it's best to regularly inspect the windshield, such as doing a simple cleaning once a month, to avoid potential hazards. If fogging occurs on the inside, it might be due to overly humid air conditioning—just switch to external circulation mode and blow for a few minutes to dry it out, which is very simple.
