Lowering the temp isn’t necessary, but if it makes you feel better, some folks do it.
By pressing I mean when you candle, does the air cell still look flat? (I don’t mean the normal tilt down the egg) Sometimes if you shine the light across the line where the darkness meets the light, you can see them pushing against it. Think of a ballon stretched tight over a glass, with something trying to get out from under it. When they poke against it and start getting into hatching position, sometimes you can see it moving by candling.
By pressing I mean when you candle, does the air cell still look flat? (I don’t mean the normal tilt down the egg) Sometimes if you shine the light across the line where the darkness meets the light, you can see them pushing against it. Think of a ballon stretched tight over a glass, with something trying to get out from under it. When they poke against it and start getting into hatching position, sometimes you can see it moving by candling.