My best friend got them so bad, she eventually just took all her live rock out and scrubbed it in fresh water. Needless to say, they didnt come back, but she basically had to wait for her tank to recycle, she had too much die off.
I wonder if you could spot scrub them... not the whole rock, just were they pop up, or squirt them with hotter water with a turkey baster. I've heard that works, but have never tried or seen it done before....