I am trying to print the motor holder with PETG and I just can't get it to stick to the the heated glass bed. I changed the temps to 240/70 but it just does not stick. Are you using any glue or hairspray to make it stick ?. I have never had to use it for PLA
Have you played around with your Z offset (height of the nozzle off the bed). I read you needed to raise that above that normally used for PLA. I tried that and found my parts weren't sticking. I went back to the PLA setting and still had some issues. I eventually went closer to the bed (only by 0.03mm) than I would use for PLA and found that fixed the problem for me.
I'm printing on a plastic flexible bed that I've had a kitchen scourer on to very slightly roughen the surface.
Have you got any masking tape handy, that would be worth a try on your glass bed.
Have you got the hot end cooling fan switched off - I leave it off for the first 4 layers and then only have it on 30% for the rest of the print to give the best combo of layer bonding and reduced stringing.