I recently tried restoring my car’s headlights using one of those DIY kits from an online store. At first, it seemed to work—the surface looked clearer—but after a few days, the fogginess returned, and they still look dull. I followed all the steps, used the sandpaper, the polish, and even sealed them with the UV protectant. Did I do something wrong, or is it just that these kits don’t last? Have any of you had better results with a different method?