I just gave my car a 3-step Meguiar's wax and while I Was at the store, I bought a bottle of Mother's plastic polish. Well let me tell you.. THIS IS ALL IT TAKES TO HAVE GREAT LOOKING LENSES. Seriously folks, my headlights were practically OPAQUE, and now they look GREAT. I'm not sure how long it'll last, but it hardly took any effort to get them looking spectacular, so I'd be willing to do it once a week or however often was necessary..

-adam