Caulk all cracks along baseboards, shelves, cupboards, pipes and sinks. Eliminate moisture. Apply a light dust of boric acid or borax in cracks and crevices.
Allow 2 months to take effect. Place whole bay leaves in several locations around the kitchen.
Or set out dishes with equal parts of either (1) oatmeal flour and plaster of Paris or (2) borax and brown sugar or (3) baking soda and powered sugar (this works for silverfish too – the sugar attracts, the baking soda kills).