What Causes the Dense Spots on the Car's Windshield?

1 Answers
StMargaret
07/29/25 10:12pm
The dense spots on the car's windshield could be insect residue. During hot summer months, insects encountering moisture can form insect residue, which easily solidifies on the glass, creating spots that are difficult to wipe off. Apart from insect residue, stubborn stains like bird droppings, asphalt, tar, and tree sap that remain on the paint surface for a long time can cause discoloration due to organic compounds and should be removed promptly. Methods for Removing Car Stains: 1. Water and Brush Cleaning. For stains that haven't been attached for long, they can usually be removed by brushing. When brushing, use water at room temperature or below and choose a bristle brush to avoid scratching the paint. 2. Organic Solvent Cleaning. If brushing doesn't remove the stain, organic solvents can be used. However, ensure the solvent doesn't dissolve the car paint (e.g., solvents containing alcohols or benzene). Generally, gasoline can be used to soak the stain before wiping it off. 3. Specialized Cleaners. Tar removers are commonly used in car detailing, primarily for cleaning organic hydrocarbons like asphalt and tar. Tree sap cleaners are specialized products for removing tree sap and bird droppings, effectively cleaning these substances from the car's surface. Using specialized cleaners ensures effective stain removal without damaging the paint. It's recommended to prioritize these products; if unavailable, the first two methods can be considered. 4. Polisher Cleaning. For stubborn stains that have been attached for too long, a polisher can be used. Adding an appropriate abrasive during operation can quickly and effectively remove tough stains like asphalt, tar, bird droppings, and tree sap from the car's surface.
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