Duck eggs pipped but not hatching

[Ducklings100]

Hi, so I have 10 mallard duck eggs in my incubator right now. One of them externally pipped Thursday afternoon. It is now Saturday afternoon and in those two days are it has made are three pips in the egg. It is still moving but not quite as much as yesterday. Is it time to assist this guy?
And, another question. All of the eggs are now pipped but one hasn’t. I’m not sure if I should put a safety hole or not. I’ve never had to before but these guys are really worrying me. Thanks.

 

[BirdsBeesTrees]

Time to help. Here's an article I wrote about call ducks but it will work for any ducks.
https://www.backyardchickens.com/articles/assisting-call-duck-hatches.76507/

 

[Ducklings100]

Time to help. Here's an article I wrote about call ducks but it will work for any ducks.
https://www.backyardchickens.com/articles/assisting-call-duck-hatches.76507/

Thank you. I will look into that. I just went over and checked on him and he seemed to be making progress but very slowly. I think he is trying to zip. Should I still help him?