Wash your print surface with dish soap and water and dry with a paper towel or fresh towel. Avoid touching or contaminating the surface once clean and dry.

If that doesn’t work, get some magigoo

Probably have to scrape it off with a razor blade. You might try acetone as a last ditch solvent method, but that’s it’s own bag of worms.

Those are a lot of fun to play with! Glad you got it working! Textured PEI sheets are great for PLA in general. Usually a good wipe with isopropyl alcohol before a print works to keep the adhesion strong. I find every once in a while actually washing and scrubbing it with dish soap and hot water is needed to refresh the PEI surface.

From what I’ve heard the Bambu Lab A1 mini is a great option for if you want to just print and not have a lot of maintenance. The version without the AMS is $299 and the AMS can be a separate upgrade down the road to enable multi-material prints.

I remember when I learned about this, I was working on an absurdly large project on my own. I was lost in all the details and losing hope of ever finishing. I was working on the backend API when I learned of this and took the time to implement the 418 response. It felt silly and brought the fun back to the project.