How Do You Know It's Time. To Take the Machine In?
I have a Brother SE400 I got December 2011. I clean the bobbin area every time I change a bobbin. The past week or so the machine has been sounding choppy. The top thread breaks, almost shreds. The bottom thread nests. This doesn't happen every time but more like every twenty minutes so I can get some sewing done. I've rethreaded it every time it happens. Has anyone ever had this happen?