Does any one know the best way to wash a crumpler bag?

Thinking about it, I've had my Crumpler two years now, and it's still almost the same as it was new. Pricey at the time, but well worth it.

I had a Crumpler for 11 years, so ner. Bought it from the store on Brunswick Street Melbourne, when they used to make them out the back - in fact they finished it while I waited.
I just bought a new one to replace it.