I never use fabric softener, but I tried re-washing to get off any residue they might have picked up at the laundromat I last washed them at.
Interfacing still fell right off. I shouldn't have waited till the return period was up to try this stuff, so 2 bolts of defective interfacing are thrown out.
Has anyone tried the June Tailor branded interfacing? At this point I'm not terribly trusting in Pellon's quality control.