Using another sharp object or regular knife could damage the print bed. If you’re careful not to damage the bed, you can also use a specially designed knife to remove a print. If it doesn’t, use a scraper to carefully unstick the edges of a print, and then move in a sawing motion toward the center. Instead, heat the bed back up to its printing temperature and see if the model pops off easier. Adjusting print temperatures and a few other settings can help with this, but for the most part we found that tugging on a print wasn’t enough to remove it from the bed. Some printers, including the Mini 2 and Maker Select v2, have print beds made of a plastic material that prints adhere to extremely well - in my experience, maybe a little too well. You then move the nozzle to each corner and perform the same test, but instead of changing the nozzle’s height, you loosen or tighten a spring to bring that corner of the bed to the correct height. To do so, you lower the printhead in the center of the bed until you can just barely slide a piece of paper between the nozzle and the bed. If your printer doesn’t automatically level its print bed (the Tiertime Mini 2 and LulzBot Mini do), you’ll want to periodically check it and adjust it if necessary. Taking some basic maintenance steps can go a long way in preventing breakdowns and print flaws.
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