Things You'll Need
Not only do cockroaches carry diseases, they are also unsightly, especially in a kitchen. Dishwashers create a perfect environment for roach infestation by providing moisture, food, warmth and darkness. The best way to get rid of roaches in your dishwasher is a two-pronged approach that eliminates existing pests and prevents a new infestation.
Sprinkle a thin line of boric acid behind the dishwasher, stove and refrigerator, as well as under the sink where plumbing pipes enter the kitchen.
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Squeeze a thin line of pesticide gel in cracks and crevices around the dishwasher.
Attach roach baits to walls near the dishwasher and other kitchen appliances. Place them close to the floor. Follow the manufacturer's directions as to how often to replace them.
Insert a thin bead of caulk in crevices around pipes under the kitchen sink and any other cracks and crevices in the kitchen.
Clean up crumbs and wash grease off of kitchen appliances.
Do not apply boric acid too heavily, as roaches will avoid large piles of it.
Do not leave dirty dishes in the dishwasher.
Do not apply boric acid or pesticide gels on food prep areas or anywhere that children or pets can come in contact with it.