If the bag is in good shape I say leave it alone! I purchased an almost mint condition XL black vintage flap and it needs little care. It sits on top of the dustbag on my purse shelf with a layer of tissue covering the back of the bag. I hang the chains over the tissue so they don't touch the leather. As for care of the leather itself, all I do is wipe it down with an unscented baby wipe after each use and it is fine. I think people overreact to lambskin; the darker colors are very easy to care for.