Hello all, I am trying to get the humidity up in my homemade incubator but I can't seem to get it high enough for lock down. I'm doing dry runs now,I have 2 pans (6"x12" and 3"x14") filled with water and sponges along with 2 Mason jars filled. I can only get 50% humidity. Is there anything else I can do do get higher percentages? Thank you for your time.