WD-40 can be temporarily used to clean and lubricate wiper blades, but caution is required during operation. Its solvent components can remove the oxide layer and dirt on the surface of the blades, briefly restore the flexibility of the rubber, and reduce skipping and noise during wiping. When using it, It is best to spray a small amount of WD-40 on a clean cloth and gently wipe the blades, avoiding direct spraying which may cause the liquid to seep into the wiper arm mechanical parts or the windshield. This is only an emergency solution; long-term use will accelerate rubber aging, as the petroleum-based components of WD-40 may cause the blades to swell and deform. For daily maintenance, It is best to use a dedicated rubber protectant, which can form a breathable protective film without damaging the material. For vehicles frequently used in the rainy season, cleaning the blades with diluted white vinegar monthly can extend their lifespan, and at the same time, regularly check whether the pressure of the wiper arm is uniform.
