Headlight lenses are clouded.

Not if they are the plastic ones, which i am sure that you have. You just buy replacement ones. You can check eBay, your parts house and the dealer but that costs twice as much.

Here is a product that worked for me.
http://www.myheadlight.com/

You can buy at local parts store or Walmart.
Let me know if I can assist further.
Please rate this solution.
Lone99star

The reason they are fogged is because of a couple of reasons,

1. The ring that holds the bulb is loose which causes water to enter.
2. The lens is cracked.

This can happen from a rock, or when people let the hood slam which hits the lights and cracks them.

Trust me, it happens.

If you can see water in the lens take the bulb out and let them dry out and look for cracks on the clear lens. If theres a big crack, just get a new lens. If not, go down to your local parts store and find some Clear RTV Silcone, Permatex if possible. Then just go around and seal the whole lens where its melted to the housing, and any cracks you find. Let it dry and the moisture will go away. It might take a day or two.

Also, disconnect your DTRL (Day Time Running Lamps) which will also help your lens last longer.