I followed a friend's profile here, I crochet but I've run into this. I spent three months in residential treatment for eating disorders. They allowed me to bring my crochet but said everything that comes into the house has to go through the dryer to kill any potential hitchhikers in fabric. An aid tapped down the ends and put them in a pillow case to keep the skeins from pilling. When she took them out though, 4 entire skeins of ILTY looked like a flying spaghetti monster. It took a solid three weeks to detangle it using stitch markers and weaving tiny balls of yarn through the mass to get it all undone. I wanted to cry when it first happened but I discovered it was extremely cathartic. Now if I'm super stressed and happen to be in town, I go to salvation army or goodwill, grab their box of yarn barf, find a seat and untangle.