You know, Tim and Kathy, I've read about the temps rising, however, I have never had that happen, at least not perceptibly. Never had to adjust for it.
The "help or not help" is really a case by case basis. There is logic in saying if they can't get out of the shell, they won't be strong anyway, but then again, sometimes a chick is just really large and can't maneuver well in there. If you help, you may end up with a chick who's just fine. I find that late hatchers don't always do so well. Those are the ones that I regret helping because usually, they have something wrong and should not have hatched. If they hatch on their own by the end of Day 22 or beginning of Day 23, that's okay, but I usually count my hatch over before Day 23 starts, if my temps have been on target.
The "help or not help" is really a case by case basis. There is logic in saying if they can't get out of the shell, they won't be strong anyway, but then again, sometimes a chick is just really large and can't maneuver well in there. If you help, you may end up with a chick who's just fine. I find that late hatchers don't always do so well. Those are the ones that I regret helping because usually, they have something wrong and should not have hatched. If they hatch on their own by the end of Day 22 or beginning of Day 23, that's okay, but I usually count my hatch over before Day 23 starts, if my temps have been on target.