The Attack of the Giant Flake

@Ante_Vukorepa - so it looks like your printer is fine now?

You say you found some smudges on the galvo mirrors - any idea what they were?

I mean - this post: What is this and should I be concerned? and this one: Mis-formed parts in fine detail resin made me wonder if there’s some route for the z-axis lubricant to the galvo mirrors …

If not that - then what did happen?