this site has fantastic info about the conditioner and comb method for getting rid of lice without chemicals or even essential oils (some allergic kids really can't tolerate the oils either), just hair conditioner and a good fine tooth comb(long, round, metal teeth)
if you look around the whole site you find heaps of good info and research these folks are doing in North Queensland
our state government health department even recommends this over chemical methods as so many lice prove to be resistant!
good luck! and happy nitpicking!
http://www.jcu.edu.au/school/phtm/PH...ce/hlinfo1.htm
***the checking method if used every second day for a week or so will get rid of the lice without any other treatment***
p.s. we used a robi-comb until we found this method - they work great but are a much more expensive option
edited to add : i know the comb method doesn't work for oceanmomma's dd's curls!!