The humidity in my viv stays around 25- 30%. I want to raise it to 40-50%, as I've seen recommended here. I only use a UTH, no bulbs of any kind. I think it's because it's cold here in Pa. and with the forced air heat it's drying things out. I mist twice a day, but worry that the substrata will grow bacteria if I keep wetting it down. Is there a safer way to raise the humidity ? Steve-o just had a perfect shed on Wednesday, but spent 48 hrs. in his humid hide first. Could I leave his humid hide in there all the time ?