My son almost had turbinate reduction as his were enlarged and he was getting sincerely the worst bloody noses in history. We treated it a different way but this is an interesting question to me. Can you clarify about the smell? Is this something you yourself notice or you and other people both? Do you think you still have secretions and clots in the cavity? You could get that checked to make sure. It does seem like a while past surgery to be having any crusting or issues like that. Have you visited your ent to discuss this?