This message was posted by YPOI-Jason on AmayaUsers.com. PLEASE DO NOT REPLY VIA EMAIL. Instead, respond to the thread on the WEBSITE by clicking here: http://www.amayausers.com/boards/cgi-bin/ultimatebb.cgi?/topic/1/969.html#000004 I have noticed that if my bobbin case gets excessively dirty, the shredding of the upper thread is more frequent. Not sure why this is. I always re-clean my bobbin case when I get an upper thread shredding issue and the problem usually subsides, unless I have a needle burr as signman posted above. =========================================================== The AmayaUsers Mailing List Website: http://www.amayausers.com Discussion Board: http://www.amayausers.com/boards Subscribe/Unsubscribe: http://www.amayausers.com/list ===========================================================