I've kept my sensors attached to the harness and straps, kept in a closet for several months. Even though they tell you to keep them in their containers or they might magnetize the closet wasn't near any magnetic sources so I thought it would be okay. But when I went to use it there was some drift to the avatar. You can calibrate them though so this isn't the reason why I am writing this. The reason I am writing is, I discovered when I was calibrating them that if you drop one of the sensors, even only 8 inches and onto a soft platform, like the cushion of the stool I was using as a table for the calibration, they mess up and start to drift. Which is very bothersome because how can one do any kind of real interaction with objects ( or like flips I've seen some people do ) since the sensors will fall out of calibration and will need to be calibrated again if bumped? I just wanted to give this heads up.