Originally Posted by Rose L

It's usually my tracks that are dusty or my wheels that have something caught in them that causes me problems, though it seems like a thread or tension issue most of the time. Clean everything with a barely damp alcohol pad and see if things are better. That's the first thing I try now when mine starts acting up and it usually solves the problem. It's the same with my Domestic machine...usually dust bunnies caught in the bobbin area.