I recently picked upped a lightly worn pair of designer shoes. They are in great condition overall with almost no wear to the outsole. However, with going through them I noticed this... mold under the insole of the shoe. It's only in one shoe. Will these be safe to wear at all? If I clean them will they be okay? Should I return them? Any advice is appreciated!!! I really like the shoes and they are quite hard to find nowadays in my size...