I have literally tried everything to help humidity rise in my hova bator. The highest my hygrometer has read is 51%. I'm trying to get it to at least 65. I've put sponges in, bowls of water, my last attempt today was to put a bowl of water with a rock in it so it would heat up more. It's at 45%. I'm going to possibly start to spray them with warm water because I have no idea how else to get humidity on the eggs.