Well I've been right back to July '08, I didn't realise I could talk that much...
I can't find the original member who gave the advise but found the one where I passed it onto someone else.
It does work...
Wet your thumb with spit and rub the jump til your finger gets warm, rub the same way the needle would go.
Then play.
If it doesn't work first time, do it again for a couple of times.
Makes sure you do it til your thumb gets quite warm.