I use a Plexiglas polish. It's a Meguiars product, used it for years. polished the chrome and lenses all around the car too. Takes off oxidation leaves no scratches. The strips you're talking about, it's a bit of a chore to clean up the first time, but after that, take a couple minutes polish them about 3-4 times a year right before you wash the car, and they will stay like new. 2014 and mine still look like glass. Although i also use garage a lot and park in the shade at work. Helps prolong the life of any car.