What does glass oil film mean?
2 Answers
Oil film refers to a layer of grease and impurities adhered to the car window glass. There are several causes of automotive glass oil film formation: First, vehicle exhaust - exhaust emissions contain various pollutants from incomplete combustion. Frequent traffic congestion in urban areas, especially when driving behind trucks, inevitably leads to these substances adhering to the glass and forming an oil film. Second, oil smoke pollution - if frequently parked near restaurant chimneys, accumulated grease and dirt will gradually form thick oil stains if left untreated. Additionally, insect remains and bird droppings, which are highly corrosive, can harden on the glass if not cleaned, affecting transparency and potentially developing into oil films. Lastly, tree resin - vehicles regularly parked under trees may accumulate sap and fruit residues.
After driving for ten years, I know all too well about the greasy film on the windshield. Simply put, it's a layer of oily grime stuck to the surface of the windshield, making it blurry and reflective while driving—super annoying. This stuff mainly comes from car exhaust in the city, kitchen fumes from restaurants, and tree sap from roadside greenery. The worst part is on rainy days—no matter how much you use the wipers, they can't clean it properly, turning raindrops into oily patches. At night, when headlights shine on it, the glare is downright dangerous. My own method for dealing with the greasy film is pretty practical: first, I scrub the windshield hard with dish soap mixed in hot water, and for stubborn spots, I use a specialized grease film remover. Remember to replace the wiper blades after cleaning the windshield—the rubber strips that have absorbed the greasy film need to go too, or else all that effort is wasted. Usually, I try not to park near restaurant exhaust vents or under trees to minimize exposure to kitchen fumes and tree sap.
