Water in my headlights
#2
I believe that there is a small rubber line that hangs out of the headlights that is situated in a low pressure area so that the moisture that gets in the unit is sucked out as you drive, for this to be your problem you would have to drive your car very rarely or at slow speeds{city}.
Please take this with a grain of salt its only a guess.
Please take this with a grain of salt its only a guess.