I have done one batch previosly with 6 eggs all eggs made it to day 21 and were shaking. None piped so i put them in water and they all sank. When i cracked them open they were all fully formed and yolks gone. Ithink i may have handled them too much during lockdown. Now i have 4 in all good so far day 19 i havnt handled them since day 18 which was when i last candled them. Onlu openening incubator to top up water. This is a pic of the incubater im using which i am borrowing. I dont know what its call or its instructions all it has is overflow holes on the side for water. Any one know the instructions for this. I dont want to loose my chicks again.