Yes...I am afraid that is what I am thinking... I am just so sure as the others are that it is not Elmers...
I blow dried really thick amounts of Elmers in my son's hair, a whole small bottle of it...it took 3 lathers to get it out... I have temporarily used it on clothes lol til I could get it sewn... and never had this problem. My grands play with it and it is all over their clothes while we make Elmer's glue fabric/or newspaper bowls. And sometimes it has been a LOT of glue on their clothes...you know how kids wipe their hands on them :roll:
This is what makes me think it is probably fray check that you are dealing with. Maybe you accidentally got some on your hand and it smeared on the fabric and you didn't notice it....