It's actually really hard to get a pulse on any of this gear in large NYC meets. Think over a hundred people in one large room, and open headphones? Come for the fun. The fun of heavy breathing headphone hoarders talking about something they only get to talk about twice a year.
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Hey, I don't see that hygiene instruction list anywhere here, what gives? The following are not optional: showering, deodorant, brushing your teeth and if at all possible, using mouthwash, clean hair so headphones stay clean, and paying for your share of the meal at post-meet dinner.