Tri-flow is good stuff - you can get it from a bicycle shop sometimes. The WD40 and 3in1 oil seem to be more trouble than they are worth - I had one machine that was all seized up and used both - got it working but when the stuff dried it was worse than ever. Kerosene will un-stick your machine just fine. Heat is good. Set it in the sun then see if it moves. It will stick again when it cools off unless you get the goo off though.