PETG never sticks well on any bed plate on our Prusa Mk4 for some reason, while it seems to stick very well on the plates coated with the same materials on our Prusa XL.

I tried to change a million parameters, and then I gave up trying to understand, because at some point all I want is to stop wasting filament and time, and get the parts I need.

So I used glue and I spent 2 minutes wiping off the glue in the sink when it's done. It's just pragmatic and it lets me get on with the rest of my life.