Cockroaches are one of the most unwelcome household pests. They can contaminate surfaces and food, and may trigger allergies in some people.
The good news is that there are simple, effective steps you can take to reduce activity and bring an infestation under control. The single thing that decides whether you stop cockroaches fast or drag it out is this: don't rely on spraying alone. Knocking down the ones you can see while leaving the food, moisture and harbourage behind them just resets the clock. The 11 tips below front-load the things that actually make the difference – monitoring, cleaning, moisture, proofing and baiting – with sprays and powders as targeted support.
📋 Quick answer: how to stop cockroaches (next 24–48 hours)
- Confirm hotspots: put 2–4 sticky traps under the sink, behind the fridge/cooker, and along skirting boards.
- Remove food and water: wipe grease and crumbs, store food in airtight containers, empty bins nightly, and fix drips.
- Deep clean hidden zones: clean behind appliances, under kickboards, and inside cupboard corners.
- Seal harbourage: close gaps around pipes, broken tiles, and wall/floor junctions.
- Use baits as the main kill method: place bait stations where cockroaches travel and hide; avoid blanket spraying.
- Use sprays/powders only as targeted support: if using a cockroach-labelled spray or dust, apply lightly to cracks, crevices and voids (where the label allows), and avoid spraying directly around bait placements.
1. Understand Cockroach Behaviour
It helps to have a basic understanding of cockroach behaviour if you want the best chance of stopping them. Knowing the typical places cockroaches like to hide gives you the upper hand. Cockroaches are nocturnal and tend to hide in damp, dark places during the day, emerging at night to feed. They thrive in warm, humid environments such as kitchens, bathrooms, and basements or cellars.
2. Eliminate Food Sources
Cockroaches are attracted to food and water, so keeping your home tidy and clean is critical. Remove food debris promptly, use sealed containers, clean up spills immediately, and dispose of rubbish regularly in sealed bins. Eliminating food sources makes your home far less appealing to cockroaches.
3. Reduce Moisture
Reducing moisture makes your home less attractive to cockroaches, which prefer damp spaces. Identify and fix leaky pipes, dripping taps and other sources of water. Make sure kitchens and bathrooms are well ventilated and dry, and air your home regularly, using extractor fans to vent excess moisture outdoors.
4. Seal Entry Points
Cockroaches can enter through tiny cracks and gaps, including around doors and windows and around pipes and other service entry points. Inspect your home thoroughly, especially around doors, windows, walls and pipework. When you find a potential entry point, seal it carefully with caulk or weather stripping. This helps keep cockroaches out and reduces hiding places indoors.
5. Set Up Bait Stations
Cockroach bait stations (and bait gels, where used) are often one of the most effective DIY control methods for an ongoing infestation. Place bait where cockroaches travel and hide, such as under sinks, behind appliances, inside cupboards and along edges.
Avoid placing bait in exposed, wet or heavily cleaned areas, and avoid blanket spraying near bait placements, as this can reduce bait uptake. Check and refresh bait as directed on the product label.
6. Use Sticky Traps
Sticky cockroach traps are a simple, effective tool for monitoring cockroach activity around your home or business. Place them where activity is suspected, such as along skirting boards, behind appliances, or in cupboards. Sticky traps help monitor and catch individual cockroaches, but they don't target the source of an infestation.
Use traps mainly for monitoring: note where you catch the most roaches, then concentrate cleaning, proofing and bait placement there. If trap counts aren't clearly falling after 2–3 weeks, expand checks to adjacent rooms (cockroaches often spread through wall voids and service gaps).
7. Use Insecticide Sprays and Powders as Targeted Support
Cockroach control sprays and powders can help with fast knockdown of visible roaches, and provide longer-lasting control in cracks, crevices and voids (see instructions). These treatments are best used as targeted support, not a substitute for baiting.
Focus applications on harbourages and travel routes (where the label allows), such as pipe entry points, skirting edges, and gaps behind appliances. Apply lightly and precisely, and always keep products away from children, pets and food-preparation areas.
Avoid blanket spraying, especially near bait placements, as this can reduce bait uptake and make control less effective. Always follow the product label exactly.
8. Apply Diatomaceous Earth
Diatomaceous earth can be used as a physical powder treatment in dry areas where cockroaches travel, such as along skirting edges, under appliances, and in cracks or crevices. Apply a thin layer only and avoid damp areas, where it's less effective. Keep it away from children, pets and food areas, and use it as a supporting measure alongside baiting, cleaning and proofing.
9. Clean Surfaces Thoroughly
Regularly clean surfaces, cupboard edges and areas around appliances to remove grease, crumbs, droppings and scent trails. This makes the area less attractive to cockroaches and supports other control measures such as baiting and trapping.
10. Regularly Inspect and Maintain Your Home
Stay vigilant by regularly inspecting your home for signs of cockroach activity. Check for droppings, egg casings and physical sightings. Regular maintenance and cleaning help you catch infestations early and stop them spreading.
Some customers use ultrasonic cockroach repellers as an additional measure, but they shouldn't replace cleaning, proofing, baiting and monitoring.
11. Consider Professional Help if Necessary
If you can't get an infestation under control despite your best efforts – particularly with fast-breeding German cockroaches – it may be time to call in a professional, who can offer stronger solutions and tailored advice. You can find a qualified controller through the BPCA directory.
Final Word
Cockroach control works best with a combined approach: monitoring, cleaning, moisture reduction, proofing and baiting first, with sprays and powders used as targeted support where appropriate. Acting quickly and consistently gives you the best chance of bringing activity under control and reducing re-infestation – but remember, spraying alone rarely gets you there. It's fixing the conditions and baiting the harbourage that actually makes it fast.
We go to great lengths to ensure that all our DIY cockroach control products and kits are effective, fast and easy to use. You may also find our expert guide to getting rid of cockroaches useful if you want to learn more about clearing them from your home or workplace.
