Hello:
Thank you for your replies. Yesterday we did clean and oil the machine. It was very clean to start with. No rust, crud, etc. With the top off I checked all the dials and everything seemed to be free. No unusual noises. It is all metal and no cams. Checked the stitch on paper and only holes in straight line, not parallel.
What is "Tri Flow" and where can it be purchased? I am really puzzled.