Ive seen many incubators that dont do that? and you can still pick up the eggs. I just said its probably not the best idea to be candeling them like that, many people just dont do that. and like i just said a second ago, i was making sure the person knew you shouldnt be doing this past that, that is definitely risky, and im confident on that.If this was the case you wouldn't be able to move eggs from incubator to remove egg turners and replace eggs back into incubator for lockdown if they are that fragile at at day 18. Not sure where you are getting that info.