I found that I had to use gluestick for PETG on my bedslinger - without it the print wouldn’t even stay in place for more than maybe a 60 minute print. I have heard about PETG fusing to glass beds also, though I have had the opposite problem, and I would just clean it off with some alcohol, but there didn’t seem to be much of any kind of residue.
Now, the gluestick, on the other hand, that is a nightmare, until I found the method: spray it with windex or water, let it soak in for thirty seconds or so, then scrape with any spatula-like object. I often take two passes, but wetting the glue turns it into a looser sorta paste that comes right off. Once all the glue is off, go over it with alcohol to dry it all up, clean as a whistle.
My goto on a glass bed was blue painters tape applied with a spatula or flat tool. I discovered that the natural oils off my fingers transfered to the painters tape when applying making the first layer fail to stick every time.
PETG and PEI are fundamentally “too compatible”. If you have a smooth sheet of PEI (like the ones on the Prusa), PETG can fuse permanently to it. Lay down some a thin layer of glue stick as a release agent before using any PEI surface.
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I have printed lots and lots of parts in PETG and not once did anything special to the bed after a print.
I found that I had to use gluestick for PETG on my bedslinger - without it the print wouldn’t even stay in place for more than maybe a 60 minute print. I have heard about PETG fusing to glass beds also, though I have had the opposite problem, and I would just clean it off with some alcohol, but there didn’t seem to be much of any kind of residue.
Now, the gluestick, on the other hand, that is a nightmare, until I found the method: spray it with windex or water, let it soak in for thirty seconds or so, then scrape with any spatula-like object. I often take two passes, but wetting the glue turns it into a looser sorta paste that comes right off. Once all the glue is off, go over it with alcohol to dry it all up, clean as a whistle.
My goto on a glass bed was blue painters tape applied with a spatula or flat tool. I discovered that the natural oils off my fingers transfered to the painters tape when applying making the first layer fail to stick every time.
PETG and PEI are fundamentally “too compatible”. If you have a smooth sheet of PEI (like the ones on the Prusa), PETG can fuse permanently to it. Lay down some a thin layer of glue stick as a release agent before using any PEI surface.