When do I assist hatch?

[Chickens and ducks]

I am hatching my first batch of duck eggs, first one pipped a day early on day 27 and started zipping quite quickly however has stopped and it's approaching 36 hours with no progress. Should I assist? Temp is stable and humidity has remained between 66 - 70 percent. Photo attached of its current state

 

[WhiteCollarWeezy]

If it has been 36 hours with no activity I would assist...depending on the status of the other eggs inside your incubator....

 

[BoundlessLove]

Yes, I would if it has been 36 hours since pip. If you have other pipped eggs, try to keep up the humidity when you remove this egg. Maybe add a wet paper towel.

Here is an article on assisting:
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/