Don't feel too bad, I've done it myself from time to time. Now I try to clean the lint out when I can see lint in this small open space by my feed dogs. This happens frequently when I have been sewing a lot. I don't have a Bernina, so I thought I couldn't help, but reading this comment, I had to comment to you that I've been there done that, as my Janone did the same thing. Have a great sewing day.