How to Deal with Windshield Oil Film?

[LondynAnn]

Removing oil film involves three steps: First, use household soapy water to scrub the windshield once, which removes the actual oil film layer on the glass surface and also washes away ordinary dust layers. If ordinary cleaning is not sufficient, then hot water should be used for soaking and cleaning. The first layer can be cleaned off with regular cold water, while the second layer consists of physical adhesion or van der Waals force adsorption layers, which require hot water to be cleaned thoroughly. Hot water provides thermal energy to molecules, causing them to move more vigorously, which disrupts van der Waals forces and breaks hydrogen bonds, ultimately removing this physical adsorption layer. If there are still residues, soak the glass surface with acetic acid mixed in water and then clean it. The third layer is a chemical bond adsorption layer, usually composed of calcium-containing ash deposits or connections on the glass surface. Acetic acid, being a weak acid, can decompose most calcium deposits, finally cleaning the glass oil film completely.