It has to have done to be able to chirp. I know it is frightening, but you can do it. Make sure you put a towel underneath in case you drop the egg. I bet you will be shaking.
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did the float test 2 moved but I'm scared they are stuck as its day 22 as they have saddle shaped air cells which I think means they can get stuck 
It has to have gone through the internal membrane or else it couldn`t chirp.I have just candeld it (I put the mattress up against the window and made a tent with the duvet) and I could see something that could of been a beak and it was moving forwards and backwards but I couldn't hear it pecking the shell. would you still assist or give it a bit more time? sorry I am such a worrier
5 out of 22 made it to this stage 
god this is such a pain in the **** of a hobby !