This is my first effort at incubating poultry, have 5 duck eggs (none of the chicken eggs were fertile) in a Kebonix 12 egg incubator (Here on Amazon), picture below. Its substantially identical to most of the other round, 12 egg incubators, and I've been generally pleased with it, particularly its ability to hold temperature - 99.5 for all but a few minutes, in total, over the last three weeks, in spite of big temperature swings in my RV.
On humidity, however, I'm less pleased. I live in FL, its almost ALWAYS humid. At times, the outside air (and thus, the air in the RV) has been more humid than I wanted. But the cold front we got this week has stripped all the humidity out of the air - in spite of adjusting the little vent to hold more moisture in, and keeping the reserve water filled, my humidity has dipped to high 20s (28+) and low 30s percentages overnight several times in the past few days. New to this, didn't even think about checking humidity as the cooler air came in. I'm using a dampened paper napkin to keep humidity up now, but have concerns about the effects of a few nights of really low humidity.
Should I start preparing for the worst, or am I being needlessly pessimistic about my hatching chances???
[I have tried candling - the eggs **seem** to be developing normally, but they have reached the point where they are so dark I'm not able to see movement in the egg, just a growing air bubble near the point]
On humidity, however, I'm less pleased. I live in FL, its almost ALWAYS humid. At times, the outside air (and thus, the air in the RV) has been more humid than I wanted. But the cold front we got this week has stripped all the humidity out of the air - in spite of adjusting the little vent to hold more moisture in, and keeping the reserve water filled, my humidity has dipped to high 20s (28+) and low 30s percentages overnight several times in the past few days. New to this, didn't even think about checking humidity as the cooler air came in. I'm using a dampened paper napkin to keep humidity up now, but have concerns about the effects of a few nights of really low humidity.
Should I start preparing for the worst, or am I being needlessly pessimistic about my hatching chances???
[I have tried candling - the eggs **seem** to be developing normally, but they have reached the point where they are so dark I'm not able to see movement in the egg, just a growing air bubble near the point]
if you’re tracking weight loss or marking air cells, you’ll have a good idea of where you’re at and can compare to what they should be at this stage of the game. 
