Check the wiper blades in the following order:
- check the wiper mechanism, tighten the elements of its fastening;
- check the rubber blade of the brushes for hardening or cracking;
- wet the windshield and turn on the wipers. Let them run for a while and turn them off. Check the glass surface - uneven brush marks or streaks on clean glass indicate the need to replace the brushes.
To replace, move the wiper arm away from the windshield until it locks. Rotate the brush 90°while pressing the latch with your finger and slide the brush off the lever hook. Install the new brush securely on the lever until it snaps into place.