What are the causes of oil stains on the car's front windshield?
2 Answers
The causes of oil stains on the car's front windshield are as follows: 1. Prolonged use of the front windshield: Extended use can lead to tiny pores forming on the glass, where dust and other airborne particles accumulate, gradually forming oil stains. 2. Infrequent cleaning: If the front windshield hasn't been professionally cleaned for a long time, everyday dust, bird droppings, fruit residues, tree sap, and other substances can slowly form oil stains on the surface. 3. Oily exhaust from preceding vehicles: While driving on the road, the oily exhaust emitted by vehicles ahead can accumulate on the front windshield, forming oil stains. In such cases, if the car windows are open, the inner side of the windshield may also develop oil stains. 4. Oily substances: It's possible that oily substances have splashed onto the front windshield of the vehicle, leading to the appearance of oil stains.
As a seasoned long-distance driver who frequently travels on highways, I've noticed the appearance of oil streaks on the windshield, primarily caused by the accumulation of road oil contaminants. These include vehicle exhaust fumes, asphalt particles, and dust that get washed onto the glass by rainwater and, if not cleaned over time, form stubborn oil films. Another contributing factor is the aging and failure of windshield wipers. When the rubber blades harden, they not only fail to remove stains but also spread the oil more evenly, much like a mop. Additionally, using wax-containing cleaning agents during car washes or the adhesion of volatile substances from the interior can exacerbate the oil streaks. I remember after my last long-distance drive, my vision became blurry, and it wasn't until I replaced the wipers and used a specialized oil film remover spray that the issue was resolved. It's essential to develop a habit of regular cleaning—using glass cleaner monthly can prevent the problem from worsening.
