Got this from a Golf Forum...
This is for the guys with a DSG that is clunky, hesitating, or not behaving itself. Of course, if you're under warranty and want a free DSG flush and whatnot, take it to the dealer.
Non vagcom method(not sure how well this one works because I have vagcom and use that method) but some say it does work. Well, it sure won't make it worse.
1. Turn the ignition on, but DON'T start the engine.
2. Floor the gas pedal and hold it like that for 20-30 seconds.
3. Turn the ignition OFF, release the gas pedal.