Ant & Cockroach Control: Common Problems & How to Fix Them
Published 2026-08-01 · Updated 2026-08-01
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-01.
Our pick: the Zero In Liquid Ant Nest Killer 500ml, Outdoor Ant Killer for Garden, Patio & Pathways, Precision Nozzle Targets Nests Direct, Long-Lasting 12 Week Control, Treats Up to 5 Ant Nests — the best Ant & Cockroach Control we tested, from £6.49.
Persistent ant or cockroach problems can be incredibly frustrating, especially when you’ve already taken steps to manage them with products like liquid nest killers or targeted powders. This guide focuses on diagnosing the root cause of ongoing infestations – perhaps a product isn't reaching all nests effectively, or a new entry point has developed – and offers straightforward checks you can perform before contacting the manufacturer for further assistance. We’ll look at things such as nozzle placement, areas where pests might be entering your home, and ensuring consistent application with products like the Zero In range or Nippon Ant Killers, to help pinpoint the issue and maximise their effectiveness.
See the full range in Ant & Cockroach Control.
#1 Pick
Zero In Liquid Ant Nest Killer 500ml, Outdoor Ant Killer for Garden, Patio & Pathways, Precision Nozzle Targets Nests Direct, Long-Lasting 12 Week Control, Treats Up to 5 Ant Nests£6.49
Pros
- Precision nozzle sends liquid deep into the ant nest
- One 500ml bottle treats up to 5 separate nests
- Long-lasting 12-week control period
Cons
- Designed for outdoor nests beneath paths and patios

#2 Pick
Raid Ant & Cockroach Killer, Insect Killer For Indoor Use, Long Lasting Protection for the Home, Pack of 6 (6 x 300ml)- Aerosol Spray
£21.99
Pros
- Bulk 6-pack keeps every room stocked
- Long-lasting residual protection against reinfestation
- Widely trusted Raid brand
Cons
- Bulk pack takes up storage space

£4.49
Pros
- Fast-acting powder kills on contact
- Up to 6 months of protection
- Also effective against cockroaches and woodlice
Cons
- Powder can be visible on dark flooring

£15.99
Pros
- Sugary bait attracts worker ants back to the colony
- Bulk pack of 30 tubes lasts a long time
- Works indoors and outdoors
Cons
- Takes several days to eliminate the whole colony
FAQ
My ant & cockroach control device isn’t turning on. What could be the issue?+
First, check that the device is fully charged if it's rechargeable, or has fresh batteries installed. Ensure the power switch is in the ‘on’ position and not accidentally switched off. If it still won’t power on, consult the manufacturer’s instructions for a reset – but if this doesn’t work, seek advice from an electrician.
The device isn't deploying any bait effectively; is it clean?+
Ensure the bait stations are free from dust and debris, as blockage can prevent the release of the attractant. Also, check that the station’s locking mechanism (if present) is fully engaged to maintain a secure seal. If cleaning doesn’t improve deployment, consult the manufacturer's documentation for specific maintenance advice.
I’m hearing an unusual buzzing or clicking sound from the device – what does this mean?+
Buzzing or clicking noises can sometimes be caused by loose internal components. Gently shake the device to see if the noise changes, but do not attempt to disassemble it. If the noise persists, discontinue use and contact the manufacturer for further investigation.
The bait stations seem to be leaking – is this normal?+
Minor leakage may occur due to temperature fluctuations or humidity. However, excessive dripping should be investigated. Ensure the units are placed in a location where they won’t be exposed to direct sunlight or significant moisture and check for any damage to the casings.
The attractant isn't holding its scent – could this be a filter issue?+
Some devices utilize replaceable filters. Check if there’s a filter in place, and ensure it hasn’t expired or become saturated with moisture. Replacing a clogged filter might restore the scent, but replace only as directed by the manufacturer.
I've placed multiple units, but I'm still seeing pests – is placement key?+
Ants and cockroaches often follow established trails. Ensure units are positioned strategically along these routes, ideally near entry points or areas where you’ve observed pest activity. Consider spacing the devices for maximum coverage.
The bait stations feel cold to the touch – could this be a battery issue?+
A consistently cold unit may indicate a failing battery. Ensure batteries are fresh and correctly installed, or if rechargeable, fully charged before use. If temperature remains low after checking power, consult the manufacturer’s advice.
I've cleaned the bait stations thoroughly, but pests are still visiting them – is there something blocking access?+
Carefully inspect around the base of the bait station for any obstructions such as cracks in walls or small gaps. Ensure nothing is preventing the ants or cockroaches from accessing the bait and that no other food sources are readily available.
The device seems to be running out of power quickly – is this normal usage?+
Heavy use, such as frequent deployments, can drain battery life. If you notice a significant decrease in battery performance after short periods of use, check the manufacturer’s recommendations for optimal usage patterns.
The device isn't responding when I press the deployment button – what could be wrong?+
Ensure the buttons are clean and free from debris. A stuck or dirty button may prevent proper activation. If pressing the button repeatedly doesn’t work, discontinue use and refer to the manufacturer’s troubleshooting guide for further assistance.
In depth
Let’s begin troubleshooting your ant and cockroach control device to ensure it operates as intended. It’s important to approach this systematically, starting with the simplest solutions first before escalating the issue.
The most frequent initial complaint is a complete lack of activation – the device simply won't turn on or start operating at all. This can stem from several readily identifiable causes. First, check the power source. Is it plugged securely into a working UK mains outlet? Try a different outlet to eliminate the possibility of an issue with the original. Examine the cable for any visible damage – cuts, fraying, or loose connections. A damaged cable will prevent power delivery. Next, if your device utilises batteries, ensure they are correctly inserted and that they are not depleted. Even if the indicator light appears functional, low battery levels can inhibit operation. Replace with fresh batteries of the correct type as specified in the product’s documentation – using mismatched or incorrect batteries is a common oversight. Finally, verify the power switch (if applicable) is fully engaged; sometimes a partially depressed switch won't provide sufficient contact for activation. If none of these basic checks resolve the problem, it suggests an internal fault and should be addressed by contacting the manufacturer’s support team or a qualified electrician to assess any potential electrical concerns. Don’t attempt to bypass safety mechanisms or undertake any repairs yourself.
Another commonly reported issue is underperformance – the device operates intermittently, provides limited effectiveness, or simply doesn't seem as powerful as it should. Begin with a thorough cleaning of all external surfaces and ports. Dust, dirt, and debris can accumulate and impede sensor function or airflow, particularly in devices employing heat or vibration for pest control. Use a soft, dry cloth to wipe down the exterior carefully. Check for any obstructions blocking vents or openings – these are frequently located near the base or along the sides of the unit. Remove any accumulated material that might be hindering airflow. If the device uses bait stations, ensure they remain filled with the active ingredient and haven’t become blocked by debris. Regularly inspect the station for signs of tampering or damage; a compromised bait station will significantly reduce its effectiveness. Furthermore, consider the environment in which the device is deployed. Extreme temperatures – excessively hot or cold – can affect performance, particularly if the device relies on temperature-sensitive mechanisms. Relocate the device to a more stable and moderate environment if possible. If these checks don’t improve functionality, it indicates an internal operational problem requiring specialist diagnosis by the manufacturer's technical team.
You may notice unusual noises emanating from the device – buzzing, clicking, grinding, or rattling sounds can be disconcerting. These noises often signal mechanical issues that require careful attention. Initially, ensure the device is on a stable and level surface to prevent vibration-induced noise. Check for any loose components externally – sometimes a slight movement of a panel or casing can produce unwanted sounds. Examine the area around the device for anything that might be vibrating against it – cables, furniture, or other objects could be amplifying the noise. If the sound seems to originate from the control buttons or switches, gently press and release them repeatedly to check for sticking or misalignment. Again, if you’re uncomfortable diagnosing the cause of the noise yourself, or if the noise is particularly loud or concerning, it’s advisable to consult a qualified technician or the manufacturer's support team – mechanical faults can sometimes indicate more serious internal problems.
Leaks are a significant concern with any device dispensing liquid, and this applies equally to ant and cockroach control products. First, carefully inspect the entire exterior of the device for signs of leakage, paying particular attention to joints, seals, and connections. If you discover a leak, immediately disconnect the device from its power source (if applicable) and relocate it to a dry area. Avoid using any abrasive cleaners on the affected areas as this could damage the finish or compromise the integrity of the seals. Check the reservoir or chamber where the active ingredient is stored for blockages – a partially blocked reservoir can cause pressure build-up leading to leaks. Use a soft brush or cloth to gently clear any obstructions. If the leak persists despite these initial checks, it strongly suggests a fault with the device’s internal components and should be addressed by contacting the manufacturer's support team for assistance. Never attempt to repair leaking seals yourself – this could pose a safety hazard.
Charging issues, particularly with devices incorporating rechargeable batteries or utilising charging bases, are frequently reported. Verify that the charging cable is securely connected to both the device and the power outlet. Try a different UK mains socket to rule out an issue with the original outlet. Inspect the charging cable for any damage – cuts, fraying, or loose connections can prevent proper charging. Ensure the charging base itself is functioning correctly; check if it’s receiving power and if there are any indicator lights confirming a connection. Clean the charging contacts on both the device and the charging base with a dry cloth to remove any dirt or debris that might be interfering with the electrical contact. If the device has an LED display, observe whether it indicates a charging status – a flashing light might signify an error message. If the device still fails to charge after these checks, there may be an internal fault within the battery system or charging circuitry, and contacting the manufacturer's technical support is highly recommended before attempting any further troubleshooting.
A persistent inability to reset the device can also present a significant obstacle to its proper operation. Locate the reset button – it’s typically a small recessed button requiring a pointed object (such as a paperclip) for activation. Gently insert the tool into the reset hole and press it firmly, but do not apply excessive force. Hold the reset button for the duration specified in the product documentation – usually several seconds. Repeat this process if necessary. If the device still fails to respond to the reset function, there may be a problem with the internal circuitry that requires professional attention. Resetting is designed as a last-resort diagnostic step and shouldn’t be attempted repeatedly if it doesn't resolve the issue.
Finally, consider any settings or configurations associated with your device. Consult the product manual to ensure all settings are correctly configured according to the intended application. Many devices feature adjustable sensitivity levels or operational modes; incorrect settings can significantly impact performance. Double-check that no accidental adjustments have been made. If you’re unsure about a specific setting, refer to the manufacturer's online resources for guidance. Incorrect configuration is a surprisingly common cause of malfunction and should be rectified before contacting technical support.
Remember, if at any point during these troubleshooting steps you feel uncomfortable or uncertain about proceeding, it's always best to err on the side of caution. Electrical devices can pose risks if not handled correctly, and attempting repairs without the necessary expertise could lead to injury or further damage. Contacting the manufacturer’s support team or a qualified technician is the safest and most effective way to resolve any persistent issues with your ant and cockroach control device – particularly when dealing with electrical components or safety-related features. They can provide expert advice and diagnose complex problems that may not be apparent during initial self-checks.