i don't think they're done for. if the yellowing progresses to consume 50%+ of leaf area, then they're probably goners. keep up the misting as often as possible. the finer the mist, the better. i also spray the interior of the dome, and thats keeps it moist-er longer. i'm crossing fingers for your lil ladies! i'm sure it'll work out. all chalks up to learning!
stay safe
-GG84