Every time I incubate I seem to have a lot of dripping eggs or eggs that go bad. I use the brinsea eco and I use my own backyard eggs. Out of 9 to 10 eggs I usually have 3 or 4 hatching, around 3 stinkers/drippers and a couple that never hatch. Is this my chickens or is my incubator dirty (bacteria)? This happened 4 times in a row now. Just wondering what could be the cause.