In my case, the Mavic was fine on ground level, but just at 30 mts or so began to get blurry, and when I returned to ground the moisture on the lens disappeared. I live in Uruguay and near the ocean, it is to moisty here. The only way that I found to solve the issue was to put it on a sealed container with silica gel, and bought a wireless hidrometer and temperature clock so I can check it anytime without opening the container, I also store the battery’s on the same container. Now the humidity is always at 20% before it was at 70 or 85%. After doing this, about 2 month ago never again had the foggy video problem. I talk to a dji tecnithian here and said that the Mavic Pro has this issue on some regions.