Condensation in 1 head lamp, not a manufacture defect?

So, I stored my bike in a cold storage for the winter, went and pick it up and on the left side the head lamp is moist from inside small bubbles of water on the inside of the lens, right side is completely fine, I called the dealer and tell him about it, he said, that is not a manufacture defect, so ask him to price me one out 180$ lol?

anyways I had that happen to me before on sled and cars and they were all covered under warranty, what do you guys think? is he fucking with me?