I recently bought a brand new TSA 120, my first Tak! Taking a flashlight to the lens, I noticed these small marks I've circled in the picture. They're not visible without a flashlight, and also not visible unless on-axis with one. They don't look like scratches, more like fingerprint oil or a small patch of residue. They're not on the outer surface so I can't easily clean it.
It seems harmless, but still annoying. Is this common with new Taks? Any idea what it is?
Thanks and CS.