I dont use thelm i still use the one that came with the bator. i belive i would put thelm in the same place but if others tell you different i would go with what they say on that. For humidity i just fill the water wells and keep a check on thelm and add water as needed. I have 3 Lg's 1 hoverbator and one sportsman. I do love the sportsman but i really like the Lg's.