How is the oil film on car glass formed?

[VanLucas]

The formation of oil film on car glass may be caused by vehicle exhaust, oil smoke pollution, or contamination from insect remains, bird droppings, resin, jam, etc. Vehicle exhaust contains various pollutants emitted due to incomplete combustion. Frequent traffic congestion in urban areas, especially when driving behind trucks, inevitably leads to these pollutants adhering to the car glass, forming an oil film. Methods to deal with glass oil film: Regularly apply a coating on the glass. There is no need to go to a specialized beauty salon for glass coating; you can buy a coating agent yourself, wash the car, then spray it on the glass and wipe it dry with a cloth. Coated glass can prevent the formation of oil film, and water droplets will quickly slide off the glass, ensuring that visibility is not affected during rainy days.