hmm.. you could remove the headlights (I never messed with 04 or 05 headlights, so I am not sure if you have to remove the bumper cover to get them out) and bake them in the oven, split them apart and reseal them. Maybe try getting the condensation out first without splitting them then try to seal them with silicon sealant (same stuff used around shower door frames, etc.)
Otherwise try following up with the dealer, I am sure they have seen this problem many times before. g/l.
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