Puck to clean up your printer bed

This is just a simple object--a disc with a lip to help pry it up. I had some very stuck on filament from a brim, so it was one layer and hard to grab. Scraping and flexing the bed didn't work. This basically melted new plastic to fuse with it, then gave me something to pull up.  Worth a try if the usual solutions (scraping, freezing, alcohol) aren't working. You can scale it in your slicer to cover only the part of the print bed you need and to be the height you want.