Shouldn't something be happening by now?

[naturemom]

Today is day 28 for my Welsh Harlequin duck eggs. They've wiggled once in a while over the past 2 days, but not today (as far as I have seen) and no pips so far. I read that it's normal for some to pip as early as 48 hours before the hatch date, so now that today is supposed to be hatching day I an getting really worried that they are dead

 

[Tuffoldhen]

I've never hatch out ducks but hear they can take from 25 to 32 days for some...your temps and humidity may have played a factor in being too low...so don't give up hope...

 

[naturemom]

Well, it's evening of day 28 and still no pips, but one of them just moved, so there is still hope!

 

[Tuffoldhen]

Fingers crossed for you!.........

 

[coffeemama]

I hope they hatch! They have a beautiful name-would love to see fluffy pics!

 

[naturemom]

Well, I think I've figured out the problem. I started out with 2 alcohol thermometers-the one that came with the incubator, and another one with a hygrometer on it. They were reading vastly different temps, so I decided to go with the one that came with the bator because the people I borrowed it from had 2 successful hatches with it. It was reading higher than the other one.
Well, just now dh gave me a digital thermometer from his darkroom equipment that he says is accurate. I lowered the probe through one of the vent holes and it is reading just under 100 degrees-too low for a still air. So maybe they'll hatch late. I hope.
Should I raise them temp a bit now, or leave it?