What Causes the Formation of Oil Film on Windshields?

1 Answers
LaSteven
07/29/25 4:53pm
Reasons for the formation of oil film on car glass: vehicle exhaust, oil smoke pollution, as well as insect remains, bird droppings, tree resin, or fruit residues. The oil film is a layer of oily substance formed by various pollutants adhering to the surface of the car glass. This layer is exceptionally stubborn and generally difficult to remove. However, if not addressed promptly, it will inevitably affect driving. Causes of oil film formation: Vehicle exhaust: Car exhaust can adhere to the glass, forming an oil film. Oil smoke pollution: If oil smoke contaminants are left untreated for a long time, they can turn into greasy residue. Insect remains, bird droppings, tree resin, or fruit residues: Insect remains and bird droppings are highly corrosive. If not cleaned off the glass, they can harden and form an oil film. Methods to remove oil film: Use a specialized oil film cleaner. Spray the cleaner evenly on the glass and wipe it with a car wash towel or sponge. Use toothpaste for cleaning. Toothpaste contains abrasive particles that can help polish the surface. Applying it evenly on the glass can clean the pores on the glass surface and remove the oil film. Use an eraser, car wash clay, or newspaper for wiping. An eraser and car wash clay can scrub off the oil film, while newspaper has some oil-absorbing properties. Dampening it with water and wiping repeatedly can also remove the oil film.
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