Help! Ruddy fruit flies getting worse and worse. There is no mouldy fruit in the house exactly, but we do save our composty stuff in a flip top thingy until it gets taken out each night - so that's usually full of smelly banana peels and so on. They can't actually get in the flip top thingy, I don't think, but they obviously like hanging around it. It's on my kitchen worksurface so it's horrible to have these little flies round the chopping board etc.
Every day I swoosh a lot out and every day new ones are either coming in or ? horrors ? are they breeding? It is getting worse, ie more every day. Where do they come from and how do we persuade them to stop?