Thank you LeonF - No, I haven't cleaned that whole needle clamp area out yet. But it sure does need it so that's up next. I think the former owner thought the whole machine is supposed to be black! I've called her Black Beauty - after the work horse who had a helluva hard working life and then, at long, well-deserved last, got lovely pastures in retirement. I'm hoping to be her lovely pastures where she can frolic as much as she likes, and be well-cared for at the same time. (Yes, I'm a hopeless romantic - I may as well admit it now!!)
By the way, even if this tip doesn't do the trick I love tips like this. One day it will come in handy, if not for me then for someone else. But if it does work I'll let you all know.