Ed,
My unit is a 2007 but I assume our headlights are the same. In my motorhome manual there is a page that says, "Your RV is equipped with headlamps that are not sealed. They have a vent system. They may exhibit, due to condensation, a fine mist or white fog or even small droplets. Most headlamps will remove this moisture through the vent system. It operates at all times but is most effective when the lamps are on and the vehicle is in motion. That is all it says and I have not witnessed a problem yet. Maybe runniing the lights as you travel will help.
Fred
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