29 day duck eggs, live, no pips or signs of hatching.

[GottaHatchEmAll]

Should I up the temp back up again?

 

[ChickenCanoe]

My incubator thermometer

The incubator thermometer cannot be relied upon. They are notoriously inaccurate.
I can almost guarantee, if you use a guaranteed accurate or calibrated independent thermometer

 

[GottaHatchEmAll]

The incubator thermometer cannot be relied upon. They are notoriously inaccurate.
I can almost guarantee, if you use a guaranteed accurate or calibrated independent thermometer

The thermometer lets you adjust the temperature and shows what temperature it's set on.

 

[SnackMeat]

If they are still alive at the temp you had running before after 29 days I would stick with that temp. It would be good to get a second thermometer. It's not impossible that the incubator heater could start acting weird halfway through but if they are still alive I would go with what has worked this far.