hiya ive the same problem, we've always got the fruit bowl full as we love fruit, i posted a similar question here as the fruit flys were everyware and i was going batty trying to swat them. so the advice was to always throw fruit / veg out thats past its best as thats what they feed on, oh and if youve a bottle of red wine open in your kitchen that'll attract them to. so cover red wine, we put fruit and veg in fridge now, and have maybe one or two floating about. although ive no idea where they come from. good luck!!