If you plan to store your bag away, be sure to do so in a cool dry place. Otherwise, leather can 'sweat'. If leather is left moist or damp for a long period of time, mildew may begin to grow. This can leave a mildew smell on your leather bag. To remove the mildew odor, try the following:
- Try spraying with 1/2 vinegar and 1/2 water, but test on a small area first to make sure it doesn't leave a mark.
- Try putting dry toasted white bread between layers of the leather and then storing in an airtight container for a few days, checking and replacing the toast as smell lessens.
- Try putting the leather in a black plastic garbage bag with some dry unused coffee grounds. Leave sealed for a few days.