What Causes Blurred and Unclear Car Windows?

[FernandoFitz]

Unclean windows are most likely caused by prolonged exposure to the outside environment, resulting in an oily film due to smoke and other factors. Below are specific methods to check whether the windows have been replaced: 1. Check the manufacturer: Examine the manufacturer’s code on the window to identify which company produced it. Automakers typically purchase windows in bulk and rarely use multiple brands or the same brand from different production locations. 2. Check the production date: Compare the production dates of the windows. If there is a significant difference in the production dates of each window on the same car, it may indicate that the car has been refurbished or the windows were replaced later. 3. Check the window label: If the windows have been replaced, the new label will differ significantly from the original factory label.