How's the rh in the space you're keeping the moms? If it's low, but then you put the cuts in a dome with high rh that you continually spray, you may just be stopping their transpiration, which they still need to do.
Maybe try rooting them minus the dome in the same space the mother is in, way less shock if you can root in the same environment they're use to. Or, you can try rooting minus the dome (I can't remember the last time I domed a cut, and I do pretty much 100%), especially if the air is dry in your mom space. If they look droopy, put the dome on, but I wouldn't spray it all the time like you said in your op, cuts still need to release their waste.