I will consider getting the thermometer in the future, but for now I started a batch of eggs yesterday and I've just turned the fans around now. I have about a dozen eggs in there. We'll see how it goes.
When I've mentioned my hatch rates to other breeders they have always mentioned humidity. I've played around with that but have never had anything above 60% I really think this could soulve my issues. I'm so wanting the 90% + hatch rates that I read about people getting.
My last batch, only the eggs 10 days old and younger hatched so I thought maybe it was old eggs not hatching but they all developed OK until the about day 19 and then died.