Originally Posted by Candace
I never mess with my bobbin tension and only change the top tension.
Try winding a new bobbin and cleaning around the bobbin case. If you mess with the bobbing tension you're likely to end up with a bigger mess and an adjustment repair cost. I find that i have to clean the machine and bobbin case a lot when I'm machine quilting no matter that I'm using the good threads, it just collects more of the batting or fabric for some reason.
Hugs