I’ve read in several places that using back off speeds and clean nozzles can help. I’m running with a new nozzle. Travel speed 150, retraction speed of 20, print speed 50. I think some of these are just defaults with cura 5.4 but I get the same thing with a higher retraction speed. What else should I look at?
I have posted this before but I have had PETG do all kinds of weird things when it is wet so maybe you should try drying it out and seeing if that helps. I have had it string before using the same settings that were fine previously just because it had too much moisture (drying the same spool out made it print fine again).