If you open a window to add the dish/sponge for better humidity, you'll disturb the overall condition less. There won't be the giant sucking outflow of air such as when you open the whole top.
I had poor hatch rates, too, every time I hatched these- like 25% when they were shipped. Many just didn't appear fertile, so who knows- but that rate was consistent with differing sources from all over the country.
They are not as easy to get from day 1 to a hatch, though, so don't worry yourself sick...it is just the way it is. Don't help- that's the killer.
Good luck!
I had poor hatch rates, too, every time I hatched these- like 25% when they were shipped. Many just didn't appear fertile, so who knows- but that rate was consistent with differing sources from all over the country.
They are not as easy to get from day 1 to a hatch, though, so don't worry yourself sick...it is just the way it is. Don't help- that's the killer.
Good luck!