I am having trouble keeping a steady temperature in my makeshift incubator. The embryo has done well, but something looks different today (day 6). When the egg is moved while being candled the embryo looks like it's floating within a fluid pocket, and for the first time I didn't see it move. The temperature reached 40 today (celcius) for an hour or 2, so I'm a little worried its died. When do you decide to toss an egg?