Noticed something when the screen was on... this piece of something that can't be cleaned away. Have rarely used my device since I got it on release day, and it's not a scratch. Looks like dust under the screen? It's obvious in the screen-on picture, and is the yellow looking thing on the screen-off one. My last replacement process for a Pro 2 was a NIGHTMARE... kept getting used units. Took 4 replacements to finally get them to send me a new one. It's small, but bothers me... anyone else had this happen, or suggest a course of action?