I've grafted twice, about twenty cells each time. Just trying to get my feet wet, so to speak, on rearing a few queens from hives that I like. I looked yesterday and the bees acted like a couple QC's might take, but most were turned into burr or drawn comb. The QC's that looked like a maybe, looked too dry (day four) for me to be optimistic.
I used a magnifier and light to carefully select larvae, coated grafted larvae with wet paper towel, fed the cell builder hive honey water the whole time...what else do I trouble shoot?

perhaps the larvae looked 'dry' upon grafting.
Frame was out of hive for twenty minute.