
- Cracked or torn rubber
Look for splits, tears or missing pieces along the wiping edge.
- Persistent streaks
Lines or smears remain after the glass and blades are cleaned.
- Skipping or chattering
The blade jumps or judders instead of sweeping smoothly.
- Large uncleared areas
Patches stay wet where the blade should be clearing the glass.
Dirt can mimic wear. Follow your manual; replace damaged blades and have persistent problems checked.