I don't know if anyone else has ever run into this, and in a way it is a lesson to be learned.. I use an office chair with rollers for sitting and sewing, the other day when I was cleaning my sewing room,(which I call my garage) I moved the chair and saw some thread strings on the bottom of the roller, so turning the chair over I saw what a mess I had, I am one that usually misses the waste basket, and never think about it, anyway the thread around the roller was a mess, looked just like the brushes on my vacuum cleaner, I spent a good hour with the scissors and tweezers getting it out of all 5 rollers, so from now on I am going to either hit the waste basket more or check the bottom of the rollers more, just which one I think of first..