I set up my grow room that's 10x10x7 and the temp is stable in there 26 degrees and there is a heater for when the light is off and everything is fine. My concern is about humidity, it's 40% right now and it's pretty stable. Should I add a humidifier or can I do something DIY to raise RH a little ? I'd like it to be at least 50% during veg and that is what I am doing right now veg. Can I hang wet towels on a pole? I don't really mind shelling 100$ on a humidifier if it's what I have to do, I was just thinking maybe 40% is ok or maybe there is an easy fix for it... Thanks!