I'm doing a similar thing...... fake leather sofa and safety pinned and taped vinyl cover....
ALL NEW TEXTILES HAVE THESE AWFUL PARASITES.
Does anyone REALLY know how to kill them?
-Ammonia... worked for a bit, then didn't.
-Enzymes.... never worked.
- Epsom Salts
-Vinegar (inc ACV)
etc etc etc.... NONE OF THIS HAS DONE ANYTHING USEFUL EXCEPT MAKE COMPANIES RICH.