To replace a Lexor wiper blade refill, remove the old insert and slide in a new one. For Pylon and Trico blades, remove the end clip or tab before removing the insert, and replace after installing the new one. Tripledge blades use a securing clip. Maintain effectiveness by cleaning the windshield and blades monthly with a commercial glass cleaner and wet rag. Avoid manually moving wipers to prevent damage. Inspect and replace wiper blade elements in the LOW speed and ACC ignition positions. Replace immediately if cracks or tears are found. Element life is typically one year due to ozone deterioration. Replace in pairs if the wiper pattern is smeared or streaked. Follow manufacturer's instructions when replacing refills with different types like Anco, Trico, or polycarbonate.