Talcum powder will stick to it, then wipe it off with a wet cloth.

Usually when rubber starts to get stick, scrubbing usually makes it worse. Since it's sticky because you are breaking down the top layer of vulcanized rubber or latex. Pretty much the only fix that i've found that works is rubbing it with a fine powder and wiping it with a wet cloth afterwards so you hands don't get chalky, and you're golden for a long while after.