Ok as someone who has ADD I can attest that it is not so debilitating a condition as to cause one to forget proper hygene. I have never been so distracted as to forget to shower. From my experience the worst examples of smelly otaku sydrome tended to have come from people who generaly gave so little concern about their personal appearance that the smell was just a another effect of this laziness. Though yes I will admit now some of those costumes are hot and as a number of cons take place during the warmer times of the year. There a couple of simple solutions; one is to wear extra deodorent or maybe carry a small thing of the spray deodorent for touch ups if your costume is really that hot, second is to plan carefuly and not wear the thirty layers of fabric costume during midday, try early evening, third is to shower at night before going to sleep so as to be assured to be reasonably clean the next day if you want to hit con immediately. If you plan to use a costume more then once see if the hotel has a washer and dryer on the premises, odds are they will. I could ramble further but I think I'll stop now while I only have one foot in my mouth :twisted: