Ducklings not externally pipping

If you can add bacitracin with no painkillers to the water you're using to wet it, you can do it less often. Wet it so its clearish. And keep it that way. Time wise, just watch to make sure it doesn't turn white. Keeping it moist also gives the veins the ability to absorb. The yawning and peeping and squirming is the baby going through stages of hatching and yolk absorption. The baby can breath and has lived in the egg for 3 weeks... It's in no immediate danger!!!
If your bator is circulated air (has a fan) it should be at 99.5°, still air I believe is 101°. Your temp is low.
Just reread, aim for 99.5°
Let him continue to work at this.... He's an early bird! With temps like that though, watch out for sticky goo. If you gently put a qtip between baby and internal membrane does a clearis yellowish very sticky substance come out?

 

80 is too high for me. I like to be around 60-65. Are your water reservoirs empty, or wet towels... Take out things that cause/give moisture. Hatching will cause humidity to rise. If you have vent plugs, remove them. If you can get a qtip between baby and internal membrane, take a gentle swab. If that liquid/goo is sticky, you have to keep swabbing and get it out. Keep that membrane moist. Adding the bacitracin to the water you moisten membrane with, means moistening less. The more shell you remove the quicker the membrane dries. Look for veins to get smaller!!
Yawning and peeping are great.

 

That's how I do humidity too! Easier to control. Sounds like you're well on your way to a duckling! Watch out for shrink wrapping and don't let that sticky stuff touch anything. Darn hard to clean. When the baby hatches you're going to have to warm wet wipe the baby off.

 

I personally would let him rest. Don't break any more shell away. The struggle is part of the process. With the next one. After internal pip, he's got 24 hrs oxygen. After that 24 hrs, if you feel you have to, then you can make a safety hole. No larger then a pencil lead though.