I'm sure that this has been discussed before but I'm a first timer and I'm worrying myself sick over doing something wrong and killing the ducklings in the egg. I've adding a wash cloth to my Brinsea incubator to keep the humidity up, that means its roughly at between 45 - 55% (never more and never less depending on when I top up the water). I candled the eggs last week and initially convinced myself they had died, they are Khaki Campbells and not easy to 'see'. I've since read that if the veins are strong (they were very clear) then even if you can't always see clear movement it is a good sign. When I watched I did eventually see movement (inexperienced and not knowing what to look for played a big part I think) but now I am worried about the air sac as it doesn't seem to be there - the egg is full of duckling at the top) I've been working hard at keeping the washcloth wet to ensure the humidity is good but by doing that am I keeping the air sac too small? My eggs are positioned pointy end downwards as recommended and I can't see a clear air sac at the top but I can see a clear patch of light at the bottom. I thought the airsac would be at the top (logic says air rises)? I'm really confused and worrying that I've done something wrong as it says if humidity is too high the airsac won't develop. They are due to hatch in 7 days time. Am I worrying over nothing, is that how the eggs are suppose to look? Any help and advise would be really appreciated. Thank you.