Troubleshoot Stringing based on image

Bambu Lab P Series Bambu Lab P2S
1

I am running a 12h print for a P2S AMS 2 Riser and after around 7h I realise this stringing error creeping in - any insight what is causing that? Filament is dry as a bone (dried 2x24h), fully calibrated manually both Flow Rate and Flow Dynamics, smaller parts print ok, nozzle is seated and clamped in correctly…I am clueless of the cause, so asking for advice - Thanks!

Elegoo Rapid PETG, 0.4mm HF nozzle, 235-240°C nozzle temp, print bed at 70°C and calibrated (actually did run full machine calibration before starting the big part), chamber at ~ 40°C

IMG_9063
IMG_90631920×2560 322 KB

IMG_9061
IMG_90611920×2560 328 KB

failed-print

2

Haha nevermind - the support lost adhesion and fell off…gotta clean my glasses :nerd_face:

IMG_9064
IMG_90641920×2560 390 KB

It was on the far edge on the left and when I inspected it, the bottom layer was all bulged outward (towards the plate), so it basically pushed itself up and away…I assume a fix (as plate was cleaned before print with detergent and water) could be to increase the heatbed temp during print? Currently 70 but should be what for PETG? 80?