What do i call this? This 'contamination' is found on the inside glass, the outer glass (front and back) are clear and clean of any blemishes. Sadly, after contacting Canon professional services, they told me they can no longer service this. Is there a technical term for what this stuff is, cause i'm having a hard time describing it hah.

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Im gonna try contacting KEH and B&H next to see what possible option i have with them.