PETG issues with right head only

Apologies if this has been asked before, I’m not finding answers in any searches. I’m new at this, but jumped right in with an H2D and have been printing a bunch of PLA, ABS and ABS GF with great results.

Trying to print with Inland PETG. I was having all sorts of stringing and quality issues, so tried it in the other head and it’s fine. Good layer adhesion, no stringing.

Is this just a matter of needing to do a cold pull of the right head, and make sure there’s no ABS or other gunk still in there?