What has happened to my wallet?
Something has grown on it, that is mold. The number one enemy for all leather product.
Here's a quick method to clean up your Ed wallet or any leather product you have.
You need the following a cloth, and remember please use cloth but not tissue paper, alcohol swap or anything than cloth. If you use a tissue, the tissue might stain onto the wallet making it more difficult to remove it.
1. Damp the cloth with small amount of water
2. Wipe off the mold with your damp cloth.
3. Let it dry.
4. Apply leather wax if you have any.
That's all you need to do. Remember to always put your wallet in a dry environment like in your cupboard, if need to, you may consider getting a desiccant dehumidifiers or moisture absorber for all your leather product in a cupboard.
Do remember to take good care of your leather product if not mold is going to attack them like this!