I am on day 21 and have 12 eggs in the incubator. I candled but am not sure what I was looking for, so just kept all of them in there. Could embryos be dead and there is NO bad smell? Basically, only some eggs did I see some movement. Some where just dark with a large air bubble. Please let me know what are signs that the embryo is dead. Also, how do I get up my humidity. It's been around 40% and I have water and a wet sponge in there. Every time I open to add water, humidity just goes down, so I don't want to mess with it too much.