I have a (Northern I think) Square yellow top plastic incubator that is new.There are raised areas in the botton to hold water.Am I supposed to put "some" water in all the sections?I have put a sponge in the bottom that is wet,but it keeps drying out.I am just not sure if I have to put water in all those areas in bottom? Also,what is the best humidity at hatching time? One more question...I have several nearly grown Cornish Cross chickens,will they breed and lay so I can reproduce? Will they come out as big,or be smaller? Thanks so much!!