To get rid of cockroaches, crickets, and ants, mix peanut butter with Karo syrup (or some other sugar) and borax. Place dollops of the bait in empty plastic food containers with holes drilled in them for the bugs to enter. The borax will kill the cockroaches and crickets. The ants will tote the bait back to the queen and wipe out the colony.
Thanks for the tip!