I have to wash ALL fabrics before I can use them because something is in them / on them that irritates my eyes,nose
throat or skin more and more as I get older. It ha gotten worse and testing for what it is does not reveal anything specific. Precuts are tricky but they must have some treatment too. Sink washing with soap meant for knits and Retayne , then BestPress , is what I do. Jelly rolls are sewed, then rinsed and ironed as above.
Angela Walters calls it by a name and that is "fondling" or something similar.