Dirty Headlights.
Here is advice:
Are you sure the light is dirty on the inside? I detail headlights at used car dealerships and most of the time the outside is dirty it only looks like the dirt...
LS headlights are easy to remove. I have had mine off a number of times to dry them with a blow dryer after condensation formed.
Remove the radiator shroud (pop-clips)
Remove the screws that hold...