How do I prevent moisture from accumulating inside my headlight assemblies? on 2002 Dodge Intrepid

I recently my headlight assemblies... there seems to be a constant build-up of moisture inside = of course after the car sits in the sun for awhile, most of it dries up. I've taken them out and let them dry (set them on top of AC vent inside the house) but no sooner do I put them back on the car and put the bulbs back in place - the moisture returns.

Asked by for the 2002 Dodge Intrepid