I don’t notice which hand they use, but more often than not, lefties will write with their hand curved over (and smudging) the text they just wrote instead of from beneath (and not smudging.) That’s when I notice. So when I notice, I don’t say, “You know you could prevent getting graphite (or ink) everywhere…” I say, “Ah. Leftie.”

I have seen righties do the same weird smudging with the arced wrist. Why do people write like that?

I recently asked about having my coating re-applied, and the folks at the eye place had a warranty system, where if it came off inside of two years, they’d strip and re-coat the lenses. Might call them to find out if you’re covered, or of they can tell you the stripping method.

Alcohol would, too. Further, avoid mineral spirits and petroleum based solvents entirely.

GPIB users and instrumentation automating folks know the problem is very modern.