So i've had my rift for 5 days now, and im noticing more and more that the very center of the lens is way blurrier then the rest of the lens... If I tilt my head down and look up at text, looking at it from the top half of the lens, its super clear, but looking at it straight on from the middle of the lens it's nearly unreadable. Is this common? Should I return the rift and exchange it for a new one? I've tried adjusting up, down, left, right.... If the middle looked as clear as the edges, it would be amazing.