Got dust in motors on landing. Fell from sky on next flight?? Hi guys, today while flying an Inspire 1 actually; it flew perfectly. After draining the battery; on landing; some dust must have gotten in the motors (landing area was dusty). At the next flight there was strange sound coming off from the quad once it got airborn. Took it down safely; flew once again and it started acting weird; tilted to one side and aiming in random directions. Had to crash-land in for so not to loose it completely (the sea was near). What the heck? (Craft is new; 10 hours of flight time and no crashes until today). Please, advise.