I need help with my featherweight, my patience is wearing very thin. LOL it atarted skipping stitches. i cleaned, oiled etc, it sewed for about ten minutes. DH cleaned, oiled, etc. i changed needle. have threaded and rethreaded, still skipps, even worse. it looks to me like the bobbin is the issue. the thread does not 'loop' around the bobbin case only once in several stitches. im thinking it is ssome dumb thing i am doing wrong, or missing. PLEASE help put me out of my misery. thanks.