Originally Posted by KwiltyKahy
Nancy Zieman recommends this method. Her explanation is that you "floss" the thread path thus removing anything that might be in there.
A machine mechanic told me niether way matters; in fact, if you want to get lint out of your thread path use waxed dental floss and thread your machine with it leaving tension disks open and floss up and back. You will be surprised at the dirt that comes out!