Hang on.......I re-read, and got to thinkin'......... You say "started pecking last night" - Like 1 little bitty peck spot, or what looks like they're cutting the big end of the egg off in a circular fashion, and still haven't come out yet?????
The humidity sounds right. I think you just need to give them a little more time and they will start popping out. I know that I have had clutches of eggs that have piped on the 21st day and havent hatched until the 23rd and sometimes the 24th day or even later. Sometimes the eggs will hatch all within a couple hours and other times it can be a slow hatch where the majority hatches over an entire day or two. I would say just keep the humidity where its and the temperature stable and given them time.
I had some G.G bobs start pipping monday, one hatched tues morning. Next one didnt hatch till tues night. Several more hatched yesterday. Two more hatched so far this morning. All were set at 6 am on the 8th. Bottom line, they'll hatch when there darn good and ready. Well, me stomp'in around like a expecting pappy aint made a difference yet...
Don't start giving up on ANY of them until after the 25th day.............been there.......done that.............and had 4 little surprises when I came in from work to chunk the remainder of unhatched eggs!