Broken or Bent frame – detachment of primary levers or blade claws from metal frame arms at rivet points.
Metal Corrosion – especially at rivet points and claws.
Visible cracks, tears, and missing pieces in the rubber element’s edge.
Flex rubber element back and forth to see if it is still flexible. Aged elements will have difficulty conforming to the curve of your windshield and create streaks.
Check element wiping edge for rounded edges which can prevent the wiper blade from making strong contact with the windshield and reduces wipe quality.
Tug to ensure the wiper blade has been securely installed on the wiper arm.
Check that rubber element is secure in the wiper frame.
Look and remove debris from trees or road that is collected near the wiper cowl
