I noticed that the RH headlight on my 02 Taurus SES collects a significant amount of moisture on the inside. I don't believe it makes a different in night vision, but it sure looks crappy. Anyway, I went on ebay to look fo a replacement and I noticed that 90% of the headlights for sale are LH. Is there a known issue with the seal of RH headlights? If so, anything that Ford replaces for free even if warranty is obviously over?
Incidentally, I did check for cracks and the O rings are intact and installed correctly. I took the bulbs out and reinstalled them. Let's see what happens. Could it be possible that moisture is just trapped inside? Maybe if I let it dry first and then put the bulbs back in...or maybe it's just a stupid idea...

 

This normally happens with a bad Sealbetween the front & rear portion of the headlightassembly
Basically, you will need to install a new headlight assy.

 

A hair dryer would knock the moisture out. But may not help - housings made in two pieces and heat sealed can leak - also look for bad seal or hairline fracture (invisible or visible) in plastic.

 

P.S. If mounting area is tourqed up and new lens doesn't fit - don't force it - mounting area may need repair.