Why Do Flies Keep Gathering at the Windows in My March Property?

Flies go to windows because of light, and the kitchen window is often the brightest place in a house. If flies are gathering there, rather than upstairs, the odds shift towards the things kitchens produce: waste, food residue and damp drains.

The Kitchen Checklist

• The bin. Clean the bin itself, not just the bag. A film of residue in the bottom is a breeding site.
• Recycling. Unrinsed tins, jars and milk cartons stored indoors for a week or two attract tiny fruit flies and house flies.
• Under the units. A spillage that has soaked in under a unit or behind a dishwasher can ferment quietly.
• The sink waste and dishwasher outlet. The inside of the pipe holds a film that feeds drain flies.
• Fruit and potatoes left in a bowl or a cupboard.

Terraces Share More Than a Wall

In a row of older March terraces the roof void can run along several houses. That is useful to know because flies resting there can turn up in your upstairs windows even though your own house is spotless. Larger, slower flies at upstairs windows in the colder months point that way. Estate homes built more recently tend to have separated lofts, so the kitchen is a better first suspect.

What You Can Do This Week

1. Take bins out, wash them and keep the lid on.
2. Rinse and remove recycling every few days.
3. Use a long brush and a biological drain product in the sink waste.
4. Look underneath units with a torch.

Done properly, those steps often end a fruit fly or house fly problem within a few days. They will not help if the real source is in the roof or in a wall cavity.

Why Fruit Flies Seem to Appear from Nowhere

Fruit flies are tiny and can enter through the smallest gaps or come in on shopping and produce. A single overripe banana or an open bottle of wine can support a surprising number. It means a kitchen window full of fruit flies is rarely a sign of dirt, just of something sweet and damp that has been left a day or two too long. That is good news, since the fix is usually quick: remove the source, wash the area and the numbers fall in days.

If They Keep Coming

We find the source and treat it. fly control in March costs £180 fixed cost, confirmed before the work begins, and the fly control cost guide describes the process in full.

Many March kitchens face the back garden, where bins and recycling boxes tend to sit close to the door, so the window and the flies' source are often only a few metres apart.

If you are in March and not sure what you are looking at, call 01223 902388 or WhatsApp us a photo of the flies.