Already covered and discussed here: http://typewriter.boardhost.com/viewtopic.php?id=2246

​Unless you want to tear apart the entire machine and perform an thorough cleaning of every individual part, you're going to have to be patient and understand that spot cleaning applications take time and sometimes numerous applications because you're counting on the fluid to slowly work its way in and cause whatever dirt that might be in there to dissolve and or to be forced out. Piecemeal cleaning will never be as effective as taking something apart, but in the long run it's quicker, and for someone of your skill level, manageable.

​At the same time, you should be checking and cleaning all of the linkages and pivot points between the key lever and the type bar. It's not always just a dirty segment that is the cause of these issues.

I had trouble with I can't remember now which typewriter, and after much segment cleaning, swearing and complaining I looked under the machine and the problem was elsewhere. A "tooth" of the comb ( the piece which guides the movement of the typebar levers) was bent, so it was pressing against the "N" key lever and then the typebar went forward but didn't come back to resting position. I pressed it gently, put it back into position and the problem was solved in about 5 seconds. After much tinkering, that is... A bad habit of typewriters is that once you assume the trouble is somewhere, most probably the spirit of the machine will move it elsewhere.

Now I remember, it was an Orga Privat 2. A toy machine or a standard sized typewriter? Bit of both.

Appreciate the feedback, as always guys

Well the only other thing it seems like it might be the culprit is, if you're looking straight down at the top of the typewriter, there's something in the space between The row of keys closest to the basket and the tops of the type bars in the resting position. Some sort of lever moves when you press the key and I wonder if I need to get in there

Or if it's possible or even likely that the problem is somewhere in there..

But yes, I have hit the other pivot points all along the underside for those keys that persist in sticking. I'll keep at it.

I can relate though to having thought the problem was something when it was actually something else completely different. I had an Adler Contessa and two keys wouldn't move it all. Totally frozen.
Of course I want about all the usual things, but in the end what happened was a piece of plastic had broken off and gotten lodged in the space through which the typebars usually move. It was as easy as getting some tweezers picking it out

Not many places things can hide though in this little hummingbird ..

I have experienced both effects -- that repeated application of solvent were necessary and the problem came back between applications, and that the problem lay elsewhere.  Patience and analysis are your friend. My pet theory for getting better and then getting worse again is that the mechanism has a gummy residue which is softened by solvent but not fully removed, so when the solvent evaporates the problem comes back. If this happens you probably will eventually fix it by repeated cleanings as gradually the dissolved residue will come out.  If the solvent has no effect at all then you want to start looking for other causes. I've seen several rubbing carriages that did not respond further to cleaning and found the problem in some unexpected place, and yes, found bent rubbing linkages for stubborn sticky keys.