I remove my Typhoon H from our Air Conditioned house (70 degrees inside) and took it to the park in 98 degree weather and high humidity (steamed my glasses when I went out). I let the drone and the controller sit on the back of the truck until I could not see any more condensation on it. When I flew it, it would not control, it would go from side to side and up and down. Scared the crap out of me. I finally brought it down to land it and it came in sideways with some speed to I pulled up until it stopped this little dance. I got the guts to try it again, about 5 minutes later, figuring, well if it is going to crash it is going to crash, and it flew fine. I would not take it up over 10' though, due to the possibility of a crash, and drove it like a 95 yr old around in circles. Is it possible that there was condensation inside the unit that was messing with it? Anything else it could be. Had the controls on angles, obstacle avoidance was off.