So its scary. I packed my phantom into a backpack that had a little bit of sand in it which I found out afterwords. Anyways when I rotate my blades, the motors have this weird clicking sound that sounds like sand is in them. When I fly it now, when lowering the phantom at a fast fall rate, it gets this un-recoverable death wobble that starts out light, but then drops like a rock to the ground. Any idea what's going on? Do I need to replace the motors, or is it something else inside there?