How to Get Rid of Cockroaches in a Kitchen

If you’ve flicked on the kitchen light at night and watched something skitter behind the cooker, you already know the feeling. Cockroaches are one of the pests I get the most anxious messages about — they’re resilient, they multiply fast, and by the time you spot one during the day, there are usually many more hiding out of sight. Panic-buying a single can of spray rarely solves the problem on its own; it takes a bit of detective work plus a layered approach, which is what this guide walks through.

Signs You Have a Cockroach Problem

Cockroaches are nocturnal, so an infestation is often well underway before you see one during the day. Look for:

• Droppings like small dark grains of pepper, clustered near skirting boards, under the sink, or behind appliances.
• A persistent musty smell that gets stronger in cupboards or behind the fridge — from pheromones the insects use to communicate.
• Egg cases (oothecae), small brown capsules tucked into cracks or the underside of shelves.
• Smear marks — dark streaks along walls or skirting where roaches have brushed past repeatedly.
• Live sightings during daylight, usually meaning the hidden population has grown too large for the available shelter.

What Attracts Cockroaches to a Kitchen

Cockroaches move in for three things: food, water, and warmth. Kitchens tend to offer all three in abundance, which is exactly why they’re the most commonly affected room in a home.

• Food residue — crumbs under appliances, unwashed dishes left overnight, pet food bowls, and unsealed dry goods like cereal or flour.
• Standing water — a dripping tap, condensation around the dishwasher, or a damp sponge left in the sink. Roaches can survive surprisingly long without food, but not without moisture.
• Warm, dark hiding spots — behind the fridge motor, under the oven, and around pipework passing through walls.
• Entry points from outside or neighbouring properties — gaps around pipes and shared walls in flats, where an infestation can travel between properties.

How to Get Rid of Cockroaches: Step by Step

Here’s the approach I’d recommend working through in order, rather than jumping straight to the most aggressive option.

1. Do a thorough clean-up first

Remove what’s feeding them: clear crumbs and grease from under appliances, wash dishes before bed, store dry food in sealed containers, and fix dripping taps. This won’t solve an established infestation alone, but skipping it undermines everything else you try.

2. Use gel bait stations

Gel baits are generally the most effective DIY option because roaches carry the bait back to the nest and it spreads through the colony, rather than just killing whichever insect happens to walk through a spray. Place stations along skirting boards, inside cupboards, and near appliance motors — anywhere you’ve spotted droppings or smear marks.

3. Add glue traps and seal entry points

Sticky traps won’t clear an infestation alone, but they help track whether numbers are rising or falling, and show where to concentrate bait. Alongside them, use silicone sealant on gaps around pipes and skirting boards — roaches can squeeze through gaps just a couple of millimetres wide.

Preventing Cockroaches From Coming Back

Once numbers are down, the goal shifts to making the kitchen a place they can’t easily survive in.

• Keep worktops and floors free of crumbs, especially last thing at night.
• Store dry food and pet food in sealed containers rather than open packaging.
• Fix leaks and wipe down damp areas around the sink and dishwasher.
• Check second-hand appliances or delivery boxes for hitchhikers before bringing them inside.
• Keep an eye on shared walls if you live in a flat, since reinfestation from a neighbouring property is common.

When to Call a Professional

I’ll be honest about the limits of DIY here: if you’re still seeing live roaches two to three weeks after consistently baiting and cleaning, or seeing them during the day in multiple rooms, that’s usually a sign the infestation is bigger than gel bait can handle. German cockroaches breed quickly and can develop bait aversion, which a technician can work around with treatment types not available to the public. It’s also worth calling a professional if you live in a flat, since roaches moving through shared walls often need coordinated, building-wide treatment.

Frequently Asked Questions