So, I have a moss colored Sienna that I've carried maybe 15 times in the year I've owned it. However, it appears to be taking on a brownish cast on the exposed areas - most noticeable when compared to the leather inside the exterior pockets, which is still a lovely green, not the vaguely dingy cast the rest of it has. I've emailed Kooba and they said that since I bought it at their sample sale I'm SOL (after buying like 10 of their bags, this will be the end of that, because I have one discoloring, one that broke - my Frankie, where the plastic in the ends popped out of the channel it was sewn into, and a Ginger which is unfortunately already unstitching itself after about the fourth time I carried it), which made me pretty upset especially considering I was just asking them what they recommend cleaning it with, not for a refund. Anyway, has anyone had this same problem? Know what to use to clean it? I probably can't afford to send it to LMB. I almost feel like the NYC air is just so dirty that as soon as I go outside the bags start accumulating scum, but I hope that's not the case! So sad. . .