When there due date has come and gone, its best to jump on things. The first thing I like to do is make them a safe hole give them 24 hours, Even if he was upside down or backwards, with the safe hole, it helps them to keep breathing. Otherwise the run out of air because they are not at the...
Right here you see that space, that to me looks likes thick gooy stuff, caused by being sticky.. The problem is he's not fully absorbed and probably can't because there's to much fluids inside. Best thing to do is lower that humidity.
That bump is him trying to push on the membrane to internally pipped. But for some reason his is unable to do soo. With the discoloration I would guess and say his sooo sticky inside that he can't break that membrane it's kind of like a rubber band, if you candle him and watch that bump for...
Try tipping the egg upside down see is any water comes out, or candle it and tip it upside down see if you can see a blob of water I'm thinking he's sticky and that is thick water, lower your humidity..
The dark spot could be bacteria infection OR to much water inside. You will be able to determine just as soon as you make that safe hole. If a bacteria infection go to the kitchen and get yourself an Onion.. You'll know why just as soon as you reply back..
Once you make the safe hole and smelled inside and everything checks out OK, give him exactly 24 hours to make progress. If he doesn't THEN we can intervene. But we don't want to until then, exspecially if he has NOT internally pipped..