Before going on my dive this morning, I found a spot of condensation about the size of a US quarter on the inside of my Subsea +5. It was pretty hot and humid this morning so I placed the lens in the water to cool it down and to see if the condensation would go away. It did shrink the size down by a bit and by the end of the dive it had gone completely. At the end of the dive after sitting outside for no more than 10 minutes, the condensation came back. Now that I'm home and the lens is in my air conditioned house it's completely gone and the lens is clear.
Is this a defect in the lens? I would think that the unit should be completely sealed and no condensation should appear on the inside. I couldn't find any droplets of water inside the lens upon inspection so nothing appears to be getting inside the lens. Any ideas would be appreciated.