I have 10 year old monofilment thread that came with my Janome. I just read posts about doing "hand stitching" effect using your machine and want to try it and it calls for using monofilament thread on top, and color contrasting thread in the bobbin. Problem is, can I still use the 10 year old monofilament thread? I don't want to cause my Janome any "hiccups" with bits of the thread that may get stuff in places I cannot see. Any advise???