i am using a direct drive all metal hotend on a ender 3 pro, this is the only modification i have done. When i print PETG it instantly peels off the print bed and goes up and sticks on the nozzle, and i have tried increasing and decreasing first layer height with no luck. the bed has been leveled multiple times, still no improvement.
@tormod-hag According to your description, I think the bed leveling is not good enough. You can try to print this attached file with PLA to adjust your bed leveling in a good condition.
@tormod-hag I was wondering about the bed material and temperature. I would try printing on some blue printer tapes and see if it adheres better.