Mineral spirits on a paper towel...with lots of ventilation.
And keep at it...eventually you will get it off.
But when you say it doesn't look clean, remember you may have damaged the finish with all the degreaser and stuff and that's why it doesn't look clean.
When the cloth with the mineral spirits comes away with out yellow on it, you are clean and it's time to rub on a new finish.
Linda C

I used TSP, found it in the hardware store. It was amazing what came off that paneling yuk!
Judy

If by TSP you mean tri-sodium phosphate, it is banned in some areas, so that may not be an option.

Also, I do believe that is take the finish off of wood so it would have to be redone.