What's going on? I keep getting flies in my kitchen. About 2 weeks ago they appeared - usually about 8 at a time doing their erratic square dance round the kitchen. I don't remember them being here last year. They are not as big as a bluebottle, but not as small as a fruit fly.
How do I get rid of them? At the moment I've had to resort to a blast of flykiller. Any other ways? They usually reappear 30 mins after spray.