Well, today I learned the importance of having more than one thermometer in your incubator. My one thermometer had been reading around 97-98 for the last week, so I slowly increased the temp setting on the incubator to try and bring it up. Today when I woke up the thermometer was dead! When I put a new battery in, the temp read 106
Apparently as the battery was dying it wasn't reading correctly. Of the 6 duck eggs I candled only 2 showed signs of life
From now on I will have more than one thermometer in there!
P.S. This is the first time I have had any issues like this. I never had an issue so I didn't see a need to add another thermometer..... Lesson definitely learned!