1/4 cup (60ml) vinegar
If your windshield wiper blades seem to skip or squeak, it could be that dirt is to blame. One of the best ways to clean them is with a soft cloth soaked in 1/4 cup (60ml) vinegar. Wipe down each blade from top to bottom and then run the wipers with a few squirts of windshield cleaning fluid to clear the vinegar away.