Just watching ( youTube) Stefan Ekstam flying a DJI F550 above cloud - time to descend - it stays there! He flips to fail-safe.... its not working! Battery running out now... then he points it towards a park to land in trees rather than risk hitting people or property. It was wrecked! A few days ago... I watched a guy with his Phantom 3 do the same .... up above clouds - it ignored the descend signals... and stayed there! Eventually it started to descend- went back up of its own choice until it lost control.... falling for a short time... the motors kicked in again - and again he got it down - but no longer looking new. I ask.. would anybody stand near their Phantom ( or any other make) with its motors running and then use a garden hose to spray a fine mist of water all over it for a few minutes? I doubt it.... but flying through cloud is basically doing just that! Clouds are not nice fluffy dry stuff floating around.... they are water particles and maybe a little collected dust. I am no expert but I am sure I read somewhere that there is also a lot of static build up around some if not all types of cloud. The above said.... I also saw a vid of Syma X8C going above cloud and and although seeming to have decent issues... ( no FPV vid) it come down under control. IMO - the bodies of all quads are not not water tight and if misted water - no matter how fine the particles - gets in among the electric bits.. water and electric do not mix well! On another thread - http://www.amazon.com/Corel-VideoSt...39687139&sr=8-1&keywords=corel+videostudio+x7 - a Syma X8C is sent around 150 metres high - and had trouble coming down...watch the vids- but my thoughts are... its an Asian country - high humidity and... rising air. Forgot my para gliding basics - clouds are a separation point - under which there is rising air. Maybe this factor is why the DJI's and other s have issues going into cloud?? This and water being sprayed on the internal components... Has this happened to you?