My printer did not put any filament down today in the top left, and instead it seems like the PEI sheet has burned and bubbled up. What would cause this, and how can I prevent it in the future?
There were pockets of air that were starting to occur, and I already had ordered a replacement PEI sheet to install. I am wondering what I can do to avoid his in the future. Was it just a cause of the PEI sheet starting to pull away from the print bed?
Also, how long should a PEI sheet last? I have been using this printer since January of 2017, and have run approximately 700 print jobs, the average length of which is around 30 minutes. Does this seem like a lot of use for the life of one PEI sheet? Is there anything I should be doing to extend its life?