[Bear]

Have your tried the PERMATEX headlight cleaning kit? In reality you need a sheet/s of 800/1000/2000/2500 grit wet and dry sand paper (the black stuff) and a bottle of MEGUIRES Plastic cleaner (all othis is in the PERMATEX kit but will cost you three times as much as buying the individual items). Wet the headlight lens and then with the 800 grit paper thoroughly soaked, start hand
sanding (back and forth, not in a circle) and keep all very wet (I keep a bucket of water out and the sand paper soaking, also a cheap foam sponge to constantly wipe the headlight lens off). As the grime starts to come off, wipe all down and go to the next level (1000) of sand paper. Keep this up and finally you arrive at the 2500 grit to smooth everything out. After the sanding (do not use a sander, and do not use a lot of pressure) wash all down and let her dry. After she is dry take the plastic cleaner and go to work polishing (any direction is fine), let her dry and wipe her off and see if you need any more polishing. I did this with my 1996 Caravan a nd the lenses sparkle (of course I cannot compete with the HID bulbs, but then I did not pay a lot of money either).