Probably just need to buy a new bobbin case, not terribly expensive. Your repairman might be kind and try to expertly file the snag away before replacing the part. Either way, easily solved.

Perseverance paid off in the end Smokey, I'm so glad you found out what was causing the 'bird's nests'. Whatever you do it should be easily fixed. Love Chris

Glad you found problem, can be so frustrating!!!!

Congratulations on finding your problem. Once had a consistent thread fraying problem. Took the cover off and traced the thread and found a plastic part where a groove had been made from the thread passing over it. Took nail polish and filled it in and it worked like new. Felt really empowered. Lesson to us all. They are finicky little devils aren't they.

I've used very fine emeryboards on this type of thing when I used to have commercial machines. It's really pretty easy to fix and what have you got loose anyway?

Well done. Some things we just have to do ourselves. Something happened like this to me after breaking a needle and the technician told me it was fixed and sent it back flooded with oil and a good fee thanks very much. It still wasn't working properly so I cleaned it up, found the burr, filed it off, and voila no problems since. PS that technician is no longer my technician!

Wow, what we come up with on our own! Proud of you. Kay

Good for you. Sometimes we just have to play detective ourselves. Glad you machine is running smoothly again.

Great job ! It just sometimes takes some good analysing and the right tool and some guts to to !

I use the black fine sandpaper, for something, if you get the band saw one about 1" wide you can get it by the metre, it is good for getting inside the top plate (where your needle goes through)...wendy

I am pleased you found the problem, happy sewing

Thanks for the update. Its interesting that such a small problem cause such a major effect on our sewing. I am so very lucky to have a dealer who gives excellent advice over the phone which has helped me solve such problems. What machine are you using? And hope that you have straight forwards sewing now

It lasted past 13k stitches this time but turns out it didnt fix it so i filed it again and the same thing happened. Im not too far away from when the service message will come up anyway and they put a coupon out in the paper for 50% off service. Plus im moving out soon so id love to get it looked at while my dad will still be the one paying