Like I said before, ghosts aren't that receptive to handfeeding.
They will back away from the tweezers or jump off the surface they are on. They swerve to avoid the insect part on the tweezers. The only way to get nymphs to actually take a handfeeding is to turn it into forcefeeding, and that will be extremely hard since they are too small to handle carefully.
Would you mind me asking, but why can't you provide them with fruit flies? Handfeeding them will be more of a trouble than throwing the d. hydei in there. It takes me at least 30 minutes to handfeed my crippled L4 ghost.