A wonderful A1 Dealer Jen Alexander has produced this short video on how to adjust your backlash spring on the size M bobbin case. If, after making adjustments it still does not produce a stitch that you like, then I strongly suggest removing it completely and replacing it with our

Mega Bobbin Genies

Mega Magic Bobbin Genies

If your bobbin case has been damaged beyond repair then it might be time for a new one! They don’t last forever…

Invest in a Towa pigtail bobbin case to replace your current one.