incubation technique

[Stephen Nzanza]

hie guys. i am new all this. incubation and i can say everything about chickens and incubation. i bought incubator from Barret electronics [360 setter]. since i have no knowledge about incubation i managed only 15 chicks out of 120 eggs. please help me figure out what went wrong. please help.
looking foward to your early reply since i am planning to put some more 120 eggs
thank you

 

[CascadiaRiver]

Fertility, Humidity, Turning, Temperature, a MILLION things could have gone wrong XD