I have build up of moisture on the inside of the headlamp covers on my 99' Nissan Quest. This does not affect the operation of the headlights, since they are Halogen bulbs that are replaceable without removing the cover, however this moisture affects the appearance of the vehicle (rusted inside and headlights covers are dull) and it will not pass inspection, until it has dried out. Any idea on removing the moisture?

Never done this before and the procedure is not that complicated. Take your car to the shop. They can do the job for you.