Congrats!!! I don't use the papertowel, I put them straight into the pine bedding. I think most that do only use it for 2-3 days, but I could be wrong.
Play this video near the bator for the zipper a couple times. If it doesn't motivate him to finish the job, then I would investigate what's going on and see if he needs help. On the average once they start start zipping they usuall keep going w/out real long periods of rest.
Depends what you are comfortable doing. Many people leave all the chicks in the bator until the end. Some people wait until they dry off. I personally try to make sure I have two hatched before moving to the brooder, but I pull mine as they become overly active to keep them away from my...
My average for pip to zip is 12-18 hours. I've had a handful go sooner and a handful later. He's just more ready than the others. Size of egg and if the egg was sitting in a "warm spot" in the bator can effect who goes first or how early the first one hatches. You have a second peeping, so...
You sure can. I use wet sponges in my bator on top of the screen (as well as filling the wells underneath). It keeps the humidity up in the 75% area I like and it's easier during hatch to slide out a sponge and rewet it than filling refilling channels if I need a humidity boost.
I'd remove the vents, but then mine are open the whole time. Peeping from inside the shell means that the chick has internally pipped. That means you could see an external pip anywhere between now and in the next 24 hours. Once they externally pip it can take up to another 24 hours for the chick...