Defective Glasses Help! (what is this black film on the lens?)

[Vixen of the Night]

I have a pack of Boblov Active 3D glasses, and one of the glasses now has this black film on one of the lens. It doesn't appear to be exterior as there is no way to peel it off or anything.

Has anyone had this happen to their glasses? And is there anything that can be done to remove this flaw or should I just junk it?

All the glasses have been used about four times since last summer. So they've never been over-used or anything.


https://ibb.co/k4dsWgL


Also the last time we had 3D movie night a couple weeks ago. The glasses did run into a problem where they kept flickering on and off, then eventually stayed on, then the flickering happened at random. Could the glasses be going out? If so, they didn't last that long in terms of use.