yeah humidity probs piss me off. i dont like running humidifiers/dehumidifiers (mainly because i am a cheap, lazy, stoned, bastard) so i exchange the air in my cab once every 7 secs, lol... makes for sturdy stems! one thing i have noticed is that with an increase in airflow, they suck alot of water... thinking the increased airflow speeds up transpiration. not sure yet if this is beneficial or not, ive read that higher transpiration can cause lockout of certian elements which then leads to nute burn. so its a craefull balance of airflow... ive had to tweak my fan controls a dozen times to get it right.