Bernina 1010 error message. Gears on screen. Main drive sync error. I show you how to fix it 

I always struggle with putting the hook back in. Thanks for the 6 o'clock tip!!!

I wouldnt recommend you use canned air in a bobbin system. The micro-lint can sometimes evade our line is sight and get lodged further inside the gears where it can then become unreachable. Use the cleaning brush that comes with the machine. They usually are static charged so lint clings to the brush fibers when cleaning the bobbin area if your sewing machine. Cool video though. Your valuable information is really important.

Thank you, this was very helpul

So condescending. Boom 😵‍💫🙄