Hi Makan,
I set Softening Temp to 1 degree above the maximum bed temp listed on the spool label “70-90C” to avoid any warning messages. I probably should have checked the web site specs. The tool tip indicates that door should be open and the top glass removed if the bed temp is above the softening temp to prevent clogging, I choose to ignore that warning. I always leave the door closed and the top glass on when printing PETG. I have had no clogging with any PETG that I have printed. I have not printed the gray rapid PETG in a while. I have been printing a lot of Elegoo White Rapid PETG (34Kg) and I have been having good success with bed temp set to 70C for Initial layer and 70C for other layers, printing mostly on Engineering Plate but also on Textured PEI Plate.