Yeah for the smell. Exactly as hydro red said. I cant put my filter in the tent due to size limitations. But that doesnt matter as long as your cooling your light with the air from the inside of the tent. Rather than the cold outside air you should have fixed your problems
And its hard to test the rh right around your plants that's comming off the soil. Obviously its going to be higher right there rather than other places in your tent. Have faith young jedi
Yeah brother unless you have some ridiculous exhaust system pulling all the moisture from the air in the tent making it as dry as a desert in there. I still wouldn't use a humidifier. I would just chill out on the air flow. I have good air flow going out and coming in on my babies they are three...
I don't believe you should use the humidifier at all. But if u must use it for your little babies keep your humidifier on low and take the cups off. But if I had your set up I would use no humidifier, and leave the cups on with the lights really close till you get your first true leaves. Then...