Best way is to get the dealer to own up to the engineering fault, have them preform their known fix to their known issue.
I've seen moisture (a few tbls) in my IC on a 80 degree summer day after traveling 50 highway miles with 4 people in the car.
Agreed that we can't keep moisutre out of the IC with this EGR system, but the key maybe keeping the moisture from freezing and building up, thats where driving harder (more heat) added with blocking off the IC as much as possible.
BTW its not a side mounted or bottom mounted IC, it's a massive 3'x2' IC thats the same size as the radiator, similar size used in the Audi S3.
http://forums.tdiclub.com/showpost.php?p=3417199&postcount=792