How to Get Rid of Flies

A few flies at the window are easy to ignore - but flies are one of the few household pests that actively carry disease onto the surfaces where you prepare and eat food. They feed on rubbish, drains and decaying matter, then land on your worktops and regurgitate to feed. The reason a fly problem so often spirals is that the flies you see are only a fraction of the story: somewhere nearby there is a breeding source quietly producing the next generation. Act early, find that source, and you solve the problem. Reach only for a can of spray and you will be fighting the same battle next week.

Signs of a fly problem

Most people notice flies before they understand where they are coming from. Look for these tell-tale signs:

• Repeated sightings indoors - live flies gathering around windows, bins, food-preparation areas or animal housing, day after day.
• Fly specks - small dark spots of fly excrement and regurgitation marks that build up on walls, light fittings, windowsills and ceilings where flies congregate.
• Maggots - creamy-white larvae in or near bins, drains, compost or decaying matter, a clear pointer to an active breeding site close by.
• A sudden mass of sluggish flies gathering in a loft or upstairs room on warm autumn or spring days, which is typical of cluster flies coming in to overwinter.
• A faint sweet or rotting odour, which can betray a hidden breeding source such as a dead animal, a blocked drain or spoiled food.

Identifying the type of fly matters, because it tells you where to look. House flies are grey with dark stripes and hairy bodies; fruit flies are tiny, tan-bodied and drawn to fermenting fruit and veg; drain flies are fuzzy and moth-like and live around moist, organic-rich drains. Each breeds in a different place, so correctly naming the culprit is the first step to finding its source.

Why flies are a risk

Flies are a real public-health concern, not just a summer nuisance. They feed and breed on faeces, rubbish and decaying matter, and then walk over - and regurgitate onto - human food. In doing so they mechanically transfer bacteria carried on their bodies and legs. Flies are associated with organisms that cause food poisoning and gastrointestinal illness, including E. coli, Salmonella, Shigella and Campylobacter, so contamination of food and surfaces is the principal risk in any home.

For restaurants, takeaways, butchers, kitchens and care settings the stakes are higher still. A fly problem carries serious reputational and regulatory consequences if hygiene standards slip - and large numbers of flies indoors are themselves a visible sign of an underlying sanitation or breeding problem that an inspector will notice. Most common UK flies do not bite, but their ability to spread contamination quickly, combined with how fast they reproduce, is exactly why they need to be taken seriously rather than tolerated. It is also worth remembering that flies are strong fliers and move readily from room to room, so a problem that starts at a back-door bin can spread through an entire premises in a matter of days.

Can you get rid of flies yourself?

There is plenty a household can do to discourage flies, and good housekeeping is genuinely effective at prevention. Keeping kitchen surfaces, bins and food-storage areas clean removes the breeding grounds flies depend on. Disposing of rubbish promptly and keeping bins sealed and clean cuts off a major attractant. Cleaning and disinfecting drains stops the buildup of organic matter that drain flies breed in, and storing fruit and vegetables covered or in the fridge denies fruit flies their target.

Where DIY falls short is in actually removing an established infestation. Shop-bought sprays and sticky strips only kill the adult flies you can see - they do nothing to the eggs, larvae and pupae developing in the breeding source. Because most flies reproduce rapidly, a fresh generation simply replaces the ones you killed, often within a couple of weeks. People also tend to treat the symptom on the windowsill while missing the real cause: a blocked drain, an overflowing bin store, a dead bird in a chimney or a loft full of overwintering cluster flies. Until that source is found and dealt with, the flies keep coming. Misusing insecticides indoors also brings safety considerations of its own, which is one reason professional, targeted application is advisable.

The fastest, safest way to get rid of flies

Professional control works because it tackles the source as well as the swarm. When you book our fly control service, a technician identifies the species and tracks down the breeding site - whether that is a drain, a bin area, a loft harbouring cluster flies or a hidden dead animal. The approach is built around that diagnosis rather than a one-size-fits-all spray.

Treatment focuses first on sanitation, removing or treating the breeding sites so flies have nothing to reproduce in. Specialised traps and baits are then used to capture and bring down the existing population, and where it is genuinely necessary, targeted insecticides are applied to eliminate adult flies and their larvae - used correctly, safely and in line with the rules on approved pesticides. The result is a clear-out that actually holds, rather than a temporary dent in the adult numbers. For commercial kitchens and food premises, this often extends to fitting electric fly-killer units and arranging scheduled monitoring, so any new activity is caught and logged before it becomes a problem an inspector could pick up on.

Preventing flies

Once the problem is solved, keeping flies away comes down to denying them food and breeding sites:

• Maintain rigorous cleanliness in kitchens and food areas, clearing spills and crumbs promptly.
• Manage waste effectively - keep bins sealed, empty them regularly and clean them out so residue doesn't build up.
• Clean and disinfect drains routinely to stop the organic buildup that drain flies breed in.
• Store fruit, vegetables and other food covered or refrigerated so fruit flies have nothing to settle on.
• Consider proofing such as fly screens, mesh and sealing entry points, which keeps flies out and is particularly valuable for kitchens and food premises.

Timing matters too. Flies are most active from late spring through to early autumn, peaking in summer around bins, drains and food waste - the busiest period for call-outs. Cluster flies are the autumn exception, gathering in their hundreds or thousands to overwinter in lofts and wall voids from September onwards, so treating known harbourage areas in late summer or early autumn is the most effective timing for those.

The law on flies

Flies have no specific legal protection in the UK, so they can be controlled without a licence. However, all treatments must comply with the safe and responsible use of approved pesticides under the Control of Substances Hazardous to Health (COSHH) Regulations and the product label conditions - another reason professional application is the sensible choice. Food businesses also have duties under the Food Safety Act 1990 and food-hygiene regulations to keep premises free of pests and prevent contamination, which makes documented, professional fly control an important part of your pest-management records.

Get expert help

If flies keep coming back no matter how much you clean and spray, there is a breeding source that needs finding - and that's where we come in. Blades Pest Solutions provides same-day and 24/7 fly control across Ipswich, Suffolk and north Essex, plus commercial cover UK-wide. We're RSPH-qualified and fully insured, we agree a clear plan with you up front, and we're confident in our work. Call 0800 037 7358 for a free, no-obligation price.