Though I would rather spend my money on fabric and thread I do have my machines professionally cleaned and adjusted regularly so that I don't encounter this type of problem. I have BERNINA machines. I have an 1130 that I have had for more than 30 years. The technician says he has never seen a machine any more used than this one. I used to make draperies professionally. And yet, with regular maintenance it works perfectly. I clean it regularly as I sew. However, when he takes it apart I am amazed at all the lint in places I can't get to. I think you need a trip to the dealer as a beginning point.