I just got my Alvarez (

) and i think its wonderful, but theres the question of a humidifier. I live in southwest missouri, its not horribly dry here buts its not moist either. I was looking at one of those soundhole humidifiers, but they have no gauge to tell if it needs to be humidified, and i wonder, what if I got one, and set it overnight once a week or so to keep it in top shape, would that hurt it, even with no way of knowing the humidity levels? I'd probably set it sunday and leave it until I get home that monday and leave it off for the rest of the week and repeat, I was wondering if theres a way to "over humidify" it.
Thanks in advance doods