Help! - Filament keeps getting tangled

[Tord MT]

Hi! I’m trying to print a disc. It’s a quite big circle (21 cm). So every round the filament gets a new twist, and it ends up intertwining and gets tangled and subsequently offsets itself and ruins the print.It’s a fourteen hour print, so there is no way I can sit and watch every second of it. I tried to print some directional attachments, but it doesn’t seem to work. Anyone has encountered this problem or have any suggestions on how to solve this. Btw this is flex filament, but the same problem occurs with regular pla. Attached some pictures. Any help would be extremely appreciated as this is turning into quite a headache. Thanks!