[header] How to kill german roaches [title] Use gel baits. [step] This type of bait comes in a tube and is applied by squeezing the tube to dispense the gel. Apply the gel along window and door trims, behind the trashcan, and along the cabinet doors in your kitchen and bathroom. 
Also apply bait gel under sinks where the drainpipe enters the wall in your kitchen and bathroom. [substeps] Apply gel bait in the crevices and cracks of your kitchen drawers, and along upper shelving and baseboards.