cindi

For me, the problem is always the top thread is being pulled down into the bobbin area. These are my only solutions. Hope they help.
First, hold your top and bottom threads down against the throat plate when you take the first couple of stitches. This prevents the top thread from being drawn down into the bobbin area:

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Next, use a "leader/ender" from there on out. A scrap of fabric. Just run it under the machine when you're ready to take your quilt pieces off the machine. That's your "ender". Leave it on the machine.

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When you start sewing again, it will become your "leader" and you won't get nests. As you can tell, mine is well loved and well used. I've got about a dozen of these floating around my sewing machine. Saves thread - and the headaches of thread nests!