By bugs. Took it up at Park yesterday. While watching video, I kept seeing little specs, flashes but brushed it off as bad video reception etc... while I had it closer to me, I could see a swarm of black bugs surrounding the ac. So I shot it straight up and out about 200' , brought it back down and as soon as I could see it, the swarm was still around it. Brought it back down to discover juice,"bug juice" splattered all over the ac.
Lesson learned: Carry a rag or wetwipes!
Lesson learned: Carry a rag or wetwipes!