That's a strange looking separation. Of course it could just be the photos. Usually, though, separation looks more like an oil sheen or such. That lens looks like actual glue, thick and 'present,' not just an interference pattern from elements separating.
Does the glue have a 3-d aspect?
(From what I have seen people do to cameras, there could be a smear of grease or even hot glue bead..... )