I just put my eggs into lockdown, but I'm having some trouble with the humidity. I'm using an NR360 incubator, and I filled the second tray and opened the vent. But the humidity is barely at 65%. I don't know if it's because of the shelf liner I put in there, but I think there should be plenty of holes for the moisture to go through. So how to I get the humidity to go a little higher?