I was having a heck of a time with my decorative stitching and thread backlash in the bobbin. I thought it was the thread (no) the stitch (no) and finally just assumed that the timing was off on the sewing machine (no).
I can’t say I know what caused the problem, but I do know what backlash is: bobbin thread whipping backwards in the bobbin case & either bunching up or creating huge globs of thread clusters on the back of the fabric or quilt or winding itself onto the bobbin spring and shredding.
I had read a while ago about a teflon ring that was being sold as a ‘cure’ for backlash and in desperation, I cut a corner off my teflon pressing sheet and trimmed it to fit the bobbin case and guess what? No more backlash and I have been happily stitching ever since! Now, cutting up the pressing pad was an act of desperation – the teflon rings are available at quilt shops and online at Keepsake Quilting. But, if you’re desperate for a solution and don’t want to wait…….