So after going through 4 Rminis in November, I tried again last week but same problem still exists. Dust under the screen! I had the same issue with the original mini but just decided to live with it in the end. Should I just do this with the rmini as it seems impossible to find a perfect one! This current one has only a small piece of dirt or dust in the corner of the scree. The screen is nice and uniform white as well which is good.