I really love all the bags with contrast white stitching - especially the most common variations, which seem to be on gold & BJ. But it's got me to thinking on whether there are any long-term issues with the thread. Does it get grubby on the handle? Have you ever (god forbid!) spilled food etc on your birkin? I imagine it would just wipe off the leather, but what if you got ketchup on the stitching? Is it teflon-coated or something? I guess it may be possible to send your baby back for re-stitching but it's not something I'd be happy about. Obviously i can be a bit of a grot so I have to consider these "hardiness" issues. So, can any of you ladies who have had such bags for a while please share your experiences?