I have never used the sub less method. Ive questioned whether the two bad eggs were even good in the first place. But it doesnt make sence with the third. Possibly bc Of the seal they werent getting enough oxygen exchange? Did you have any holes in the top at all? I do know the way I inc. With vermiculite and holes in the top works well. I've only Had 2 stills throughout my whole breeding experience 4th year now, it seems to work well and I'm comfortable with it. Last year I think the two stills from the same clutch was due to too low of temps from a new inc malfunctioning. Perhaps a few holes or not sealing the tub would prevent the two remaining eggs to die.
Morgan
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