I have bought, returned, and re-bought this particular set of sunglasses more times than I care to admit. Every time I get them there is some kind of a faint black smudge on the white part of the frame somewhere in the front. The smudge is actually part of the frame and cannot be cleaned off. Today I just received another pair but this one had a red smudge on the frame instead of the usual black. Was this a common thing for these glasses? It seems that finding one without a smudge is impossible at this point:/