How Does Windshield Oil Film Form?

[SanOlivia]

There are several reasons for the formation of oil film on car windshields: 1. Vehicle exhaust: The exhaust contains various pollutants from incomplete combustion. Frequent traffic congestion in urban areas, especially when driving behind trucks, can lead to these pollutants adhering to the windshield, forming an oil film. 2. Grease pollution: Parking regularly near restaurant chimneys can result in the accumulation of grease and dirt over time. If not cleaned promptly, this can turn into stubborn oil stains. 3. Insect remains and bird droppings: These substances are highly corrosive. If left uncleaned on the windshield, they can harden and affect the glass's transparency, eventually forming an oil film. Additionally, tree resin is another factor. Cars frequently parked under trees may be affected by tree sap and fruit residues.