Anyone found an effective way to deal with the fingerprint issue?

I've tried using the cleaning cloth for my eyeglasses, but it doesn't seem to do much. I wrote enTourage to ask what they recommend, so I want to hear back from them before I try something like Windex, etc., just in case it might damage the case's finish. But if they're any less chicken-hearted souls than me out there, I'd appreciate hearing your input. Thanks in advance.
EDIT - I just received this reply:
"We recommend wiping off fingerprints with a dry, soft cloth similar to those for cleaning lenses."
Well, I guess I'll have to give it another go with some different cloths and see what happens.