Hinge grind

Does anyone else feel the hinge grinding when opening/closing the Duo? I started to feel it a few weeks after owning the device. However, if I open it slowly, I don't feel a grind at all.

I'm not even sure it's fair to call it a grind, because whatever is going on inside the hinge doesn't seem to affect usage. In fact, the device still folds smoothly, just with a weird feel to it.

Just a random thought... If the hinge is having problems, I wonder if that affects the hinge angle sensor, which then leads to oddball behavior like both screens being on when in single screen mode, or one screen turning on before the other.

I'm trying to determine if my hinge is actually defective or just normal wear and tear. I was well aware of the Duo's software issues before buying the device, but sometimes it's hard to separate the software from hardware issues with this thing!