Truma with lockdown - Duck eggs

[IrisJade]

Last hatch i lost a few due to shrink wrapping, The Incubator showed 65% Humidity and the last time i candled the eggs they internally pipped. And then i had a feeling they were dead i ended up opening them to see it was a shrink wrapping issue. It was so confusing even when i upped the humidity settings with just water. Was the water not enough? i have the brinsea mini. I currently have some new ones coming into lockdown i really dont want this to be the same again any advice would be great i thought of adding a sponge to see if that will help but it will always get me worried if the humidity is too much. i always slide abit of card or something to make a vent to balance the humidity.