Wiper Blade: Inspection

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

Check and clean the rubber assembly windshield wiper.

CAUTION:

Do not use organic solvent-based cleaner when cleaning rubber parts in order to avoid rubber part deterioration.
Do not use the cleaner that includes silicone oil. Failure to do so can cause chattering sound.

Clean rubber edge (a) using a soft cloth or a sponge dampened with washer fluid or mild synthetic detergent that is diluted two times or more. Wiping rubber lip (b) results in peeling of the black coating component, causing wiper chattering.

Courtesy of SUBARU OF AMERICA, INC.

Check that the rubber is firmly attached after cleaning.

Replace the rubber assembly windshield wiper if rubber part hardening, deformation or damage is found.

Operate the washer system to check if a chattering sound or insufficient wiping occurs.
If a chattering sound or insufficient wiping occurs, perform the following procedures.
1. Make sure that the blade assembly windshield wiper is not deformed and the movable part moves smoothly.
2. Remove oil film and dirt from the glass.
  CAUTION:
  - When powder-type glass cleaner is used, use after having been dissolved in water sufficiently. If it is used in less water, the glass surface may be damaged.
  - Clean the glass surface using a soft cloth or sponge with glass cleaner.
3. Operate the wiper again. If a chattering sound or insufficient wiping occurs, perform the procedures again.
If defective is not improved after performing step 1 without replacing the rubber assembly windshield wiper, replace the rubber assembly windshield wiper with a new part.
If defective is still not improved after operating the washer system again, replace the blade assembly windshield wiper with a new part.