As a new pilot I am am having problems getting consistant flights. I am sure I am doing something wrong but what? One flight will go great. Nice hover, left and right, up and down, good control. Next flight a few hours later Phantom will just tip over on takeoff or jump 20 feet into the sky and takeoff on its own tour, not much control. Very light wind. I reset the compass, it flew OK then next time erratic. There is snow here so could it be the compass connector got wet?