How to keep cockroaches out of the kitchen: a practical prevention guide

1. Why the kitchen attracts cockroaches

Cockroaches need three things to live and breed: water, food and shelter. The kitchen provides all three in a small space. Drops of water around the sink, a minor leak under the cupboards, bread and rice crumbs, grease on the cooker, and warm gaps behind the fridge and oven make it an ideal environment.

In apartment buildings cockroaches often come in from the shared drainage system and service openings, so your flat may be clean while the problem comes from elsewhere in the building. Prevention therefore works on two fronts: reducing what attracts them, and closing their routes in.

2. Cut off water

• Dry the sink and worktop before bed, and don’t leave dishes soaking overnight.
• Fix any leak under the sink or around the dishwasher and fridge connections.
• Don’t leave wet cloths and sponges on the worktop.
• Check drip trays under the fridge and kitchen air conditioner — collected water attracts insects.
• Make sure floor drain covers fit well and hold water to block smells and insects.

Water is what cockroaches look for most in the hot summer — cutting it off alone makes the kitchen much less attractive.

3. Don’t leave food available

Keep rice, sugar, flour, dates and spices in airtight containers rather than open bags, clean crumbs after every meal, and wipe grease from the cooker and the wall behind it regularly. Don’t leave pet food out overnight.

Empty the bin daily, use a bin with a tight lid, and keep rubbish bags away from the kitchen door while they wait for collection. Remember the places we forget: under the fridge and oven, inside the microwave and toaster, and in utensil drawers.

4. Close hiding places and entry routes

Cockroaches hide in cracks and narrow gaps and come in through openings around pipes and services. So it helps to seal cracks around the sink and between cupboards and the wall, close openings where pipes and cables pass, and fit mesh on drain and ventilation openings.

Avoid storing cardboard boxes in the kitchen or storeroom — cardboard holds moisture and makes an ideal hiding place, and eggs can arrive in boxes from shops and warehouses. Unpack shopping and get rid of boxes outside the home.

5. Watch the appliances

Electrical appliances give off warmth, and the gaps inside and behind them are dark and quiet, so small cockroaches often hide there: behind the fridge, under the oven, inside the dishwasher and in the coffee machine. Clean behind and under appliances regularly, pulling them slightly away from the wall when you do.

If you see small cockroaches coming out of an appliance, don’t try to take it apart or spray it — tell the company, because treatment around electrical appliances needs suitable, safe methods.

6. What about household insecticides?

Many people spray the kitchen with household insecticides when they see cockroaches, but this can be misleading: the visible cockroaches may disappear for a few days while the hiding places and eggs remain, and the spray may land on food surfaces and dishes — not appropriate, especially with children at home.

That’s why this guide gives no pesticide names or usage methods. The prevention here is safe and useful for every home; treatment is handled by a licensed company that uses approved products in the right places and gives you clear instructions for before and after the visit.

7. When do you need a pest control company?

Prevention alone may not be enough when:

• You see cockroaches during the day — usually a sign hiding places are crowded.
• You see many small cockroaches — a sign of breeding indoors.
• They appear in more than one room, not just the kitchen.
• They come back weeks after cleaning and sealing.
• You run a restaurant, commercial kitchen or food business.

Read about cockroach control, and choose how widespread and how long-standing the problem is in the form so offers are more accurate.

8. In apartment buildings: coordinate with neighbours

In an apartment building, cockroaches may return whatever you do in your flat if the problem is in the shared drains or a neighbouring flat. So it helps to tell the landlord or building management and for residents to agree on treating the whole building, including drain rooms, bin rooms and stairwells.

Coordinated treatment works better and costs less over time than each resident treating their flat at a different time, letting cockroaches move from flat to flat.

9. A simple weekly routine

• Daily: dry the sink, empty the bin and clear crumbs.
• Weekly: wipe grease from the cooker, clean under small appliances and check under the sink.
• Monthly: clean behind the fridge and oven, review containers and the storeroom, and get rid of old boxes.
• Seasonally: before summer check cracks, openings and drain mesh, and consider a preventive visit if the problem recurs.

10. Restaurants and commercial kitchens

In restaurants, cafés and central kitchens the issue goes beyond comfort — it’s about food safety, the business’s reputation and meeting what inspectors expect. A commercial kitchen runs long hours with heat, humidity and a lot of food waste, so prevention needs a clear daily system that every staff member knows, not individual effort.

Key parts of that system: cleaning drains and grease traps regularly, checking goods and boxes on delivery before they go into the store, keeping back doors closed with air curtains or mesh, and keeping stock off the floor. Even so, most food businesses need a regular contract with a licensed company that provides written reports after every visit. Read the restaurant pest control guide.