Again, cleaners wouldn't have found it as they don't touch anything in the closet. If there was a crew change, I guarantee the new crew would have noticed it as things like that stand out like a sore thumb. They would have then handed it over to the GA. If it was a through crew, it MAY have gone on to the next station. When you have a closet full of navy uniform blazers you sometimes don't notice the stripe (or lack thereof).