Kind of long, I'm sorry. But I am really frustrated here and wanted to include as much info as possible. I have been using an IncuView forced air incubator for over a year and haven't had a hatch rate over 50% - most have been much less than that, closer to 20%. I have redundant thermometers and hygrometers, so I know temps and humidity are good (99.5F and 40%-50% for incubation, 65%-75% for lockdown). We live at 9,000 feet elevation, but I have read that this shouldn't be a problem if the eggs were laid at the same elevation which they are. I suspected that the egg turner for the IncuView wasn't turning the eggs adequately, so I tried an experiment. Instead of laying the eggs flat and letting the turner turn them, I put the eggs in standard paper quail egg cartons (fat end up) and just put a box under the end of the incubator. This put the incubator at a fairly steep angle. I switched the box to the other side at least 3X a day, basically rocking the eggs back and forth like other egg turners. I sterilize the IncuView with a mild bleach solution before incubation and let it dry thoroughly before using it . I don't normally wash my eggs before incubation because they are usually pretty clean when I collect them. This time I did a quick rinse thinking that maybe that was part of the problem too. My my results were the worst I've ever had. 2 chicks hatched out of 79 eggs. After 21 days I gave up and moved the 2 chicks to a brooder. I dissected the unhatched eggs. 43 appeared to be fully developed or close to it, 10 looked partially developed and 23 were totally undeveloped. If the 43 developed eggs hatched the hatch rate would have been 57%. Still not that great, but to have 43 almost fully developed chicks not hatch is frustrating to say the least. I am really getting tired of throwing away so many eggs after each hatch. Any ideas of where to start troubleshooting here? Thanks for any ideas.