biting saga

i don't remember if i've written about this before, and i'm too lazy to go back and check!! so a brief explanation...
samantha is a biter. it started as her only form of self defense. katelyn and annie used to pick her up and carry her everywhere and it would make samantha really mad. the only way she could get them to stop was to bite them. well, she has figured out that biting gets her pretty much anything she wants. if she wants to go on a slide and a kid's in her way she bites 'em. if someone is sitting where she wants to sit on the couch...she bites 'em. if a kid has the toy she wants...she bites 'em. you get the point. so far she has bitten about 5 or 6 neighborhood kids, and a random kid at the children's museum. it has gotten ridiculous. on saturday she bit annie 4 times....finally the last time i put tabasco sauce in her mouth. she scream bloody murder, so i had hopes that her biting habit might have been broken. well, just today i was babysitting my good friend's boys and samantha bit one of them. so, i did the tabasco sauce thing again....hoping....she didn't even cry. she just gaged a few times and then was over it. she did drool for about 15 minutes....but that's it. i seriously do not know what to do about it. she bit me once and i bit her back....that didn't work. she's been in time out, that hasn't worked. she's been spanked...didn't worked. so ya, if anyone has a cure for biting please let me know!!!