Finally, a solution... well, not exactly a solution, more of a remedy. I have (had) a 2006 330FG with a sticky finish all over, but it's worst of all on the neck.
I tried everything: distilled water and corn starch (see below), polishing with a soft cloth, cutting polish (T-Cut; it's an English product for cutting back dulled auto-paint prior to waxing), coating with fast-fret, turtle wax, EVERYTHING!!! Still sticky. So I put I put the guitar back in its case because it was such an unpleasant piece of very expensive firewood to play. For shame, Nico!
THEN I JOINED A BAND. I suddenly found myself without a substitute guitar and rehearsing for a couple of hours twice a week. Lo and behold the natural 'wear and tear' from my hands combined with a good wipe-down after each session have slewed off the tacky, gummy layer of finish and it's now pretty much as it should be. Even on the fretboard. Ok, it hasn't cured the problem on the body (yet...), but the neck is now playable again.
The answer to your problem? Love your guitar: take it out, glory in it, and most of all PLAY IT!!!
PS Sorry about the overuse of punctuation, I'm just a very happy boy right now