Does anybody know how to stop this. I have tried higher temperatures with no cooling, lower temps with lots of cooling, slow print speeds down to 30mm/s, closest seam etc but cannot stop the filament (PETG) from stringing across the threads. It doesn’t happen on the external threads only the internal ones. Any ideas?

Centauri Carbon 2
Elegoo Rapid PETG (dried)
250c head 70C Base
40-150 mm/s
Seam closest
5 walls
Cooling 10-30%