Just wondering what you all recomend for keeping your headlight lenses looking new. I see a lot of cars/trucks that have faded, dull or even yellow headlight covers. When this happens to a car/truck, I think it spoils the look of the whole car, no matter how shiney the paint is. How can I prevent my headlight lenses from getting this ugly disease? Is there a product made just for this purpose? Thanks in advance to any replys.