Default light spot where simcard is inserted!

So I just received my Nexus 5, and coming from an iPhone 5, I needed to use a nano to microsim adaptor. It was a snug fit, and I now have this yellow'ish tint at the top, where the sim tray is, see pic:

http://i.imgur.com/b3jHt2B.jpg

It is only visible with a dark background and the brightness turned way up, I tried removing the sim tray, and that seems to help with the problem a little bit. I already tried sanding down my sim card, as it was sticking a little bit up from the simadaptor and tray, however it haven't helped...