Nancy said, "I finally have it cleaned up and moving freely - well everything but the feed dog drop. That was frozen solid. With lots and lots of oil and my DH's brute strength we finally got it moving if we push hard on the bar on the underside of the machine at the same time pushing the thumb screw. That part is still pretty frozen."
I have found that those tend to stay frozen the longest on about any machine, too. Some times you would think it is the knob or push buttons that are frozen... You can stand the machine on end, drop in some T-F oil on the pointy end and in between cracks, let it set overnight. Next day use heat if necessary. Picture of the pointy part that needs some Tri-Flow oil.