Is the eyelashing on the underneath side? If so check that your top thread is firm in the tension discs. If you can pull the top thread through the needle easily while the foot is down the tension needs tightening, or it's not threaded correctly.
With the bobbin, you say it stands on end if you pull the thread up, does it not unravel? If not the tension there may be too tight.
You might be getting backlash from the bobbin turning too fast. I just cut a small circle of cotton fabric, cut a hole in the middle, and fit it into the bobbin casing before inserting the bobbin. It seems to stop that problem.
You might have to play with them both to find that happy medium.
Good luck.
Last edited by Gay; 08-06-2014 at 02:32 AM.
Reason: additional info