I tried changing the needle, loosening the presser foot pressure, rewinding my bobbins, etc. with no success. This morning I decided to do a little investigating and solve the problem.
I normally take my machine in for bi-annual cleanings, but because of my work schedule I haven't lately. In an effort to save funds, I was toying with the idea of doing my own machine maintenance. Not that I don't think it's important for you to take your machine to a professional, but I think sometimes it's OK to take matters in your own hands. After all, I could put that $75 plus that it costs me to good use like buy more fabric! :)
I've found great tutorials on YouTube in the past for quilting techniques so I decided to stop there first. I did a quick search for "clean bernina" and found this excellent video:
Let me tell you, Sara, if you saw the inside of my machine, you would give me a BIG scolding! This is so embarrassing!
Look what I found after I removed my stitch plate...

Ooh, what pretty colors. Have I been needle felting on my machine? That can't be MY machine!
I was in denial big time.
And what I saw when I actually got down there and looked inside the bobbin housing...

Boy mister, you need a shave! How many weeks have you been growing that beard?
I got right to work swiping and oiling and accepting that I let my machine get in this condition.
Here's a few "after" shots. Ah, that's much better...


Thanks for making that excellent tutorial Sara!
***UPDATED***
To add that the machine sews like butta' now! Purrs like a kitten. Back in business. Thanks everyone for asking!
Take some time to make your machine "happy" today!






























