So I guess that this might be an unusual problem but I am having issues removing my prints.
The issue is most acute with PETG and PLA but also affects ABS. TPU is not a problem and I have not used PA yet.
I have a double sided PEI build plate (well, several now!) and the PEI coating has been pulled off when removing the prints and it is next to impossible to remove the brim. At least, with ABS, I can use acetone but that does not work for other polymers. Obviously, I get no warping but the cost of replacing the plates is becoming significant.
Can anybody suggest a way of reducing adhesion that I could try?
After the plate cools put it in the freezer for 10-15 min, then see if you can remove your prints.
Also, you didn’t mention if you were using any glue or not.
Thanks for the reply.
Sorry, no glue. Not tried the freezer but I do let them cool to room tempereature before I try to detach them
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PETG can sometimes stick quite hard on some printers (the usual “trick” is to put painters tape on the bed and print on that), but PLA should come easily off as the plate cools.
PETG as well.
I’m waiting for the plate to be really cold before I try to peel off the model.
Hi @Cygnet-1 
welcome to the forum!
This is an interesting issue; I highly recommend investing in a bottle of Vision Miner Nano Polymer adhesive; it costs quite a bit but lasts for a very long time. It creates a great bond but then allows for easy releases of ASA, ABS, PETG, etc., from my testing so far on both PEI & Carbon Fiber build plates (I run a WhamBam plate on my SV08 with the Carbon Fiber finish and apply the adhesive maybe once every three prints with a few drops). It doesn’t leave a residue like other adhesives I’ve tried before but ensures a tight hold while printing and easy release once the plate has cooled (for both small and large prints, especially after they’ve cooled).
I print PETG nearly exclusively on my SV08 and the carbon fiber-covered plate without issues. PETG likes to stick to PEI as it has a lot more to hold onto, but an adhesive acts as a great release agent.
I look to overcome the potential issue with a quick squirt of 3DLAC onto the bed (or magigoo / similar). Funnily enough has the ability to help with release of parts as well as adhesion. Try it. See if it helps.
Thank you all for your suggestions. I will be trying them all as soon as my new build plate is delivered. I have pulled large chunks of the PEI coating off the last one by using PETG!
As long as you haven’t applied any agent, try this: when the plate has cooled down, give the object one to three lateral knocks with a hard object, a stick, or maybe a rubber hammer. Those short knocks don’t put any pulling force on the surface, but help with the object coming loose.
when bed adhesion is too high sometimes a few light sprays of glass cleaner will do the trick. Don’t wipe it off but leave it there until the solvent evaporates when the bed heats up. This will create some light contamination on the bed without leaving marks on the print but making the print easier to release.