Here’s a photo of the camera:
I cleaned the print head and mirror box windows and the mirror inside the print head:
As you can see, the dirt came off fine! Cutting through material (I tried Medium Clear Acrylic) goes a lot better now, although it’s not perfect: at some places I have to exert some force because the pieces don’t fall out by themselves. But for now I don’t mind that, because it’s a huge improvement already, so thanks for all help so far!
Now the only problem that remains is the “stuck on scanning” issue. Like I mentioned before:
I tried all the things mentioned in the first post on Stuck Centering/Focusing: How to Troubleshoot for potential Lid Cable issues before contacting Support 😲, but unfortunately nothing helped. The 5 connections are all in place.