I will also testify to the benefits of cleaning the machine. It is quite amazing how much lint can accumulate around the feed dogs from a short period of sewing. I like the idea of filling only two bobbins. I may have to change my ways a little because I usually wind maybe 10 or 15 bobbins so I can keep right on quilting without stopping to fill a bobbin. Another thing that goes along with the cleaning of the lint is to change the needle. It may look perfect but I have found that changing the needle after 2 or maybe 3 lap quilting projects is a very good idea.