you said you tried water in trays, correct? How big of a tray did you use and how much water? If its too little water, I'm sure it wont do much. Keep the water near your intake so that your exhaust isnt throwing all of your newly formed humidity out of the grow area.

Just a though
sobekobe Reviewed by sobekobe on . MAJOR Humidity issues....plz help! This is my first grow...here is what I have built in my garage: 4x2x4 grow box, 400w hps (approx 1.5 ft from plants), 8in diameter exhaust fan sucking air out, 4in diameter inlet coming from the front of my house which faces the beach(cool dense air), 8in circulating fan inside grow box, 6 plants total (all under 8 inches). My temp range is 60-85, but my humidity ranges from 13%-20%. I have tried wet towels in the box, trays of water, putting plastic domes over plants, misting ( the mist Rating: 5