Has anybody tried boric acid to control them? I've "heard" that it works and the following links seem to bear this out.
"Boric acid is a stomach poison that also adheres to the cockroach when it walks across the dust. The cockroach will then ingest the dust while grooming itself. "
http://www.ext.vt.edu/pubs/entomolog...8/444-288.html
"Boric acid is generally considered to be safe to use in household kitchens to control cockroaches and ants."
http://en.wikipedia.org/wiki/Boric_acid