If You can not unwind the thread by snapping your wrists a couple of times the bobbin stress is probably established way too significant and really should be modified. In addition, we describe how to scrub it and response some commonly requested questions on sewing machine routine maintenance. Qualified ideas http://sewingmachinesboulder55384.onesmablog.com/The-Fact-About-Colorado-sewing-machines-That-No-One-Is-Suggesting-33302183