Thanks again for leaving our home in nice condition, Lauren. With respect to the fruit flies- generally they come with the produce. It's hard to say whether they came in with us before your stay or whether they came from the grocery store. My advice to any of our guests who may be concerned about fruit flies in the summer is to make sure that their fruit is not over ripe, or better yet, store it outside in a secure container that the animals can't get into. Thanks for letting us know though, we'll keep an eye out. We are at our home this weekend, and don't see them but you never know!