IDK about injecting them bc they are deflating due to the approaching hatch date. I would try to improve on my humidity delivery system and nix the injection. IMO only. I just hatched out a clutch on Aug3 that severely dimpled and deflated. All the hatchlings emerged on their own and all healthy. Try to boost your humidity to 100%.There is no mold on these eggs and they are not discolored or rotting in any way. Be careful whatever you decide and good luck. Also, imo, next time I would use a diffuser for my eggs.