I've had my Flair 2 months now, and noticed the same thing with the XL jets. The seat nearest the control panel, and the foot jet are the ones that seem to "turn down" by themselves the most. I think it's from either just rubbing against them, or the water pressure from the jet somehow turns them down. The jets in the lounge don't seem to be a problem....and in my tub they are the ones that take a little more effort to turn. The jets that turn down by themselves seem to turn a little too easily.