Q: How to maintain and replace windshield wiper blades on Lincoln Mark VII?
A: Regularly wash wiper blades with mild detergent to remove road film. Inspect the windshield wiper and blade assembly periodically, as sun and elements can cause the rubber to crack. Replace hardened or cracked blades. Test the wipers on a wet windshield and replace if they leave an uneven pattern or streaks. Check and tighten the fasteners of the wiper mechanism. To remove the blade assembly, use a small screwdriver to push down on the release spring at the center of the blade, then lift the release lever or press down with the screwdriver and pull the wiper blade off the wiper arm pin. To install, push the blade assembly onto the pin until it snaps into place. To replace the rubber blade element, use a screwdriver to release it from the retaining claw and slide it out. Install a new element by sliding it into the retaining claws and securing it by twisting the backing strip into the end claws. Ensure all claws are locked onto the strip before installing the blade on the wiper arm.