ok, i have a homemade bator out of a fish aquarium. i have duck eggs in and its day 25, my humidity is 60% and temp is 98, it says to bump humidity up to at least 70, but i am having trouble getting it past 60%. i have a small dish on bottom with water, 3 on top, with the 2 with sponges and water. i find that adding warm to hot water brings it up but having trouble keeping it there. any suggestions?????? this is my first hatch, n i don't want to go wrong. please help.