I had a moderately large print going and part way through it the brim started to peel off of the bed. This does not bode well for a good print. This is a PEI bed and I did apply glue to it to help with adhesion but no joy. We have all been there. A strip of scotch tape (I do know how it got that name if any one wants to know) laid down over the offending bit held the brim down quit well, I think the heat from the bed helps to make it stick better and the print did not lift. It would be best to pause the print but I like to live dangerously and did while dodging the a X-Y arms slamming around the printer.