I'm having a hard time keeping the humidity in my ig tank at a constant decent level. It's a 40g tank so there's no room to put a humidifier in there. I tried one of those reptile humidifier things from Petco & it didn't do anything. I do spray the tank with a spray bottle a few times a day, but that will only raise the humidy a little & it goes back down rather quickly.
What should I try without breaking the bank?