X-2 on handle lots....Like you I put them in and there not touched tell there moved to hatcher.Then not touched tell little ones are dry...I only open to add water and remove chic's.After reading most everything ;sounds like A Brinsea OCT is used and they still hand turn each egg.Most everyone I know turn Inc on right side then later to left.What Am I missing here.? I used to candle when I had white eggs but now dark eggs and I can't see.So I quit candling .If its fertile its fertile or not you can't change it now.If its dead you can't bring it back now ...You only have 5 variables .Fertile eggs/Temp control/Humidity control/Turning/Clean disease free environment, that's the way I try to think about it. If you got those under control YOU WILL HATCH EGGS....cva34
Candling can be and is a wonderful tool to the trained eye.And its contributed to where we are today with hatching ..Mine trained eye never got trained...
actually.. there are more variables than that
nutrition of the parent stock.. if the hen especially is lacking in certain vitamins it can result in weak, deformed or even dead chicks
lethal genes.. I know in quail (and I am sure in many other birds/critters where there are assorted color combinations) there is a "white lethal" gene which can kill chicks just before hatch or not too long after.. lol.. in dachshunds there is a double dapple scenario where pups can be born without eyes, deaf, other deformities or be dead at birth.. so genetics can play a major role
bumping or jarring of eggs that have started to develop can also kill an embryo
contamination from air born vapors.. I know of several people who lost entire clutches of eggs which were pipped due to things like over heated teflon fumes too close to the bators, paint fumes and air fresheners
lack of air flow which results in carbon dioxide poisoning (vents need to be open at hatch.. and if there are large eggs like emu eggs or the bator is packed full of eggs it needs to be located in a place where there isn't "dead air")
i have the
Brinsea octos too.. and I never turn the entire bator if I have to hand turn.. so long as your hands are clean and free from oils, bacteria etc (which is why I recommend washing them with antibacterial soap just to be on the safe side or using clean disposable gloves) it's safe to hand turn.. you just have to be careful not to drop or jar the eggs while turning.. people have been hand turning eggs for centuries and have had successful hatches
heck.. I have been handturning several batches of emu eggs and turkey eggs for the past few months and don't have issues with eggs dieing before hatch