We've been privileged this January to be hosts to a bunch of smallish flies (not tiny ones) who apparently think they're spending their holiday break either in our kitchen or lounge, or sometimes in the bathroom and sometimes in the laundry. There are only ever about half a dozen at any one time, but they lazily float around the centre of the room, refusing to go anywhere near windows or doors, and consequently not only get in your way whenever you move, but also make it irritating watching TV, because there's this subtle movement constantly being caught in your peripheral vision.
Blowflies have the sense to make a great fuss about the fact that they've somehow got themselves trapped indoors, and are eternally grateful if you open a window for them that they can actually find their way out of. Although they do seem a little lacking in brain: open a window and they'll fly smack into the closed one next to it, or sit on the glass in the open window wondering where the breeze is coming from. But at least they generally leave when requested. And they plainly have places to go and things to do, if the speed of their departure is anything to go by.
These other little flies, however, have long since outstayed their welcome - though at least they don't make any noise. Finally we made up a mix of vinegar and water to spray at them, because I don't like using normal fly sprays, especially in the kitchen. All that happened was they got wet and carried on swinging back and forth across the room drying themselves. My daughter's comment was that the only way they would die was if they drowned from excess water. This didn't seem to happen.
Last night we resorted to using a proper fly spray. There was a sudden emptiness in the middle of the room after I'd sprayed it at them, and I was sure they'd all been sent to the place where all flies go (not somewhere I'm keen to follow, incidentally). Obviously one or two missed the blast, because this morning I notice that distinct movement out of the corner of my eye. Hopefully however, they'll have the sense to realise that the Summer holidays are over and they need to go back to wherever they came from.