HTC One M8 lens cover issue
I had the same problem; contacted HTC, which shipped my phone for free for lens cover replacement. I suspect they merely used an original. Two months later my lens has the same problem. I think Temperature has an effect on the film. Does anyone have foolproof method of cleaning the film off. I once again contacted the president of the company. No word back from them yet. They completely stripped my phone when I sent it back. I do not understand why if they were merely replacing the lens cover.