CRESTED GECKO EGG NOT HATCHING.

Question
MY SON'S GECKO LAID 2 EGGS ABOUT 80 DAYS AGO. ONE HATCH ABOUT 3 WEEKS AGO. THE OTHER (THE LARGER EGG DID NOT HATCH. SINCE THEN HIS GECKOS HAVE HAD MORE EGGS EVERY MONTH OF SO. WE HAD ON JUST HATCH FOR THE NEXT GROUP AND STILL THE PREVIOUS ON HAS NOT. SHOULD I ASSUME ITS NOT GOING TO HATCH. WHAT SHOULD I DO?

Answer
Hello Greg,

Do you have the eggs in an incubator with the temps being around 80 & the humidity around 70-80%.  The incubation period runs from 45-60 days, so that is probably why they have not hatched out yet for you.  :-))
Are they fertile, correct?  

Tracie