Replacing the tailgate wiper blade
Fold the wiper arm outward.
Grasp the inner section of wiper blade (at the arrow).
Turn counterclockwise to use the wiper blade's end position as a lever to help detach it.
Press the new wiper blade into place and check that it seats securely.
Fold the wiper arm back toward the tailgate window.
Cleaning
Keeping the wiper blade clean helps improve visibility and prolongs its service life. Clean it with a stiff-bristle brush and lukewarm soap solution or car washing detergent.