Get your windshield wipers operating correctly again by replacing the Wiper Pivot Shaft.
Most wiper pivot shafts fail due to age, seal damage and lack of lubrication. Factory specs recommends lubrication every 90 days.
Tech Tip: Wiper shaft lubrication is accomplished by removing the wiper arm, gently removing the plastic seal, and applying a few drops of oil where the shaft protrudes from the brass barrel. Switching on the wiper motor with the arms still removed, and applying a few more drops will ensure full and proper oil penetration.