Does anyone know what could have caused my headlight to melt? The bulbs did not burn out. I just have two melted round spots the size of small golf balls in the center of my headlights. If it was a voltage regulator, wouldn’t the bulbs of burnt out or a "fail" message on the odometer? Any advice would be gratefully appreciated. I don’t want to purchase new headlights just to have the same thing happen agian.