I've ordered the two 2-packs of SPG Steinheil screen covers through amazon.com and every single screen cover has been defective so far. They will not adhere around the optical ball, and often wont adhere around one or two of the corners either. I know its not my installation, I've done it so many times by now with different screen covers. The screen was wiped clean with a microfiber cloth and there is NO lint or dust, the screen covers are also clean, etc. What is going on??? Is anyone else having this issue?? I've returned both packs to amazon and am at a loss for what to do...I don't want to keep ordering them if this is going to continue to be a problem. Other than this issue, I've been so happy with them! They are awesome! But if this continues, I will have to try something else.