What causes the windshield to become blurred after using a degreaser?

[JeremiahRose]

The windshield, after prolonged exposure to sunlight, heavy rain, wind erosion, etc., develops a microscopically rough surface with numerous pores or pits on the surface. Various oily substances, car waxes, and dust from daily driving can easily adhere to this roughened windshield surface. Specific solutions are as follows: 1. Soap water: Use household soap water to scrub the windshield once, removing the actual oil film layer on the glass surface and washing away ordinary dust layers, which helps in further cleaning. 2. Hot soap water: Soak and wash with hot soap water. If regular cleaning doesn't suffice, then hot water should be used for soaking and cleaning. Hot water provides thermal energy to molecules, causing them to move more vigorously, which can break van der Waals forces and hydrogen bonds, ultimately removing the physical adsorption layer. 3. Use specialized cleaners: Scrub with a hydrochloric acid solution. Hydrochloric acid is a strong acid that can dissolve and decompose most organic or inorganic substances, including metal oxides, without affecting the glass. This is because the main component of glass, sodium silicate, is only soluble in hydrofluoric acid and strong bases.