Before buying a new plate, try washing it. In most cases adhesion drops not because the coating is worn but because of skin oils \u2014 and it comes back after an ordinary wash with dish soap.<\/p>\n
A PEI coating holds the part thanks to the micro-texture of its surface. A thin film of grease fills that texture \u2014 and adhesion is gone. Touching the print surface with your fingers a few times is enough.<\/p>\n
Isopropyl alcohol, which people often wipe the bed with, removes glue residue and dust well but does a poor job on grease. That\u2019s why \u201cI wiped it with alcohol and it still won\u2019t stick\u201d is so common.<\/p>\n
A simple test from the manufacturer: pour water over the surface. If it spreads as an even, continuous film, the plate is clean and will hold well. If the water beads up, there\u2019s still grease \u2014 wash it again.<\/p>\n
Sometimes it\u2019s the other way round: the part sticks so hard it risks tearing off a piece of the coating. Most often it\u2019s PETG on a smooth PEI plate. In that case a thin layer of glue stick acts not as an adhesive but as a release layer.<\/p>\n
What you may need:<\/strong> PEI build plates<\/a>, glues and adhesives<\/a>.<\/p>\n This article has been checked against the official Bambu Lab documentation. Procedures and temperatures may differ for a specific printer model \u2014 check your model\u2019s page on the manufacturer\u2019s wiki.<\/p>\n<\/div>\nSources<\/h3>\n
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