I have had several messages about not using slots that I acquired and have forgotten about since I stopped flying to the airport, as I said I forgot I had them, so how do I close them or can I just leave then to expire?
You cannot really "delete" slots that you have (unless you edit/delete certain route, but that is a different story). If you do not fly to that airport and have no routes active there, just let them expire.
Thanks Sami