Originally Posted by littlehud
Could it be the oil. Does it come in contact with any part you oiled. I have never had that happen before.
I oiled the bobbin area. I used the same amount I always do. Usually I get a little on the bobbin thread as it comes out immediately after being oiled, which is why I do the test whites. I'm not sure exactly how the top thread goes into the bobbin area, but I guess it would make sense that it could come into some contact with residual oil...