House flies can be annoying at best, unhygienic at worst (Picture: Getty Images)Amid the fourth heatwave of 2026 (so far), UK homes are being invaded by an increasing number of flies. Here’s how to get rid of flies in your house, prevent infestation, and stop them coming back indoors. Assess where they’re congregatingBecause flies thrive on moisture, you’ll typically find that they’re buzzing around in certain spots where this accumulates. Buy an electric trapRather than swatting bugs all day, an electric trap is the best shop-bought method to stop flies in their tracks. For the most part, flies are unhygienic and annoying, but not a severe issue if they buzz in and out.