A neighbor bought what you are talking about and it helped a little. I saw this on the net & you might try it first.
Restore Your Headlights
Sometimes the plastic headlight cases can get pretty cloudy, causing your headlights to look dull. Using some toothpaste (and an old toothbrush that is past its prime), buff the inside of the plastic. Then, rinse out the headlight case thoroughly. Once dry, reassemble the light fixture. Good as new.
Here is the link for other uses for toothpaste. Let us know how it works out.
http://www.stylelist.com/chris-barne...b_1337815.html