its allways good to refer to the manufacturer guidelines but there is a lot of things to take into mind

Where is the printer
is the printer in a dusty place is there particles flying around all of this can go into your printed part

Print bed
what is the print bed made out of

Oil
oil that is on your printer to help lubricate some parts could end up going on to the printed part

there is a lot more to take into consideration
https://www.inov3d.net/petg-3d-printer-filament