You can try the oil method. By either coating the scalp with olive oil or mayo (real). Once you have the scalp thoroughly coated cover with saran wrap or a plastic cap followed by a towel and let them sit for an hour.
This should smother the lice as they can't breathe in the oily situation. This will kill the lice/nits and give your daughter a nice conditioning treatment as well.
I hope this helps you out.