yes I did. Of the 8 unhatched eggs there was only 1 that had a chick in development and it was waaaaay behind so probably passed in the process.. The foam incubator was a day behind the other for some reason. It's eggs did not start hatching until day 22 and I left them in there for another 36 hours before removing the chicks and unhatched eggs. So I feel I was almost 100% in hatching the viable eggs.did you open the unhatched eggs to see their stage of development? different incubators will have somewhat different hatch times. you could be prematurely giving up on the foam incubator. much can be learned from opening the unhatched eggs.