I have been using several Airport Expresses to stream iTunes wirelessly for several years. We just moved, and I set up a new network, giving all the Airport Expresses (four) new names (e.g., changing work room to kitchen), doing a factory reset on each Airport. Now, My iTunes has three of the old-named speakers in the Multiple Speakers listing, in addition to the four new ones with proper names. (For example, work room is still there, despite there being no work room Express on the network. I assumed that a factory reset would have deleted all references to work room.) In any event, my question is, how do I delete the old, never-to-be-used-again speakers from the Multiple Speaker list? Thanks.