Remove and replace the wiper blade:1. Lift the wiper arm up away from the windscreen.2. Depress the release lever on the arm and slide the blade down the arm and out of the hook at the end. Some cars have a tab that will need to be lifted with a small screw driver.3. Insert the attachment onto the new blade or wiper arm4. Tug on the blade to make sure it is secure. Listen for a click.5. Gently lower the wiper arm back onto the windscreen.