Fruit flies in the bathroom?

What the heck? why are their fruit flies in the bathroom? I don't keep fruit in there. And I bleach down everything everyweek, and daily clean the shower, has anyone had this problem? what can I do?

Fruit flies in the bathroom?
Make sure you dump bleach down the drains. Second you can use a combination of Apple Cider Vinegar and drop of dish soap in like a shot glass. Yes it will smell of the vinegar but after about a day or two all of the fruit flies will have been attracted to this combination and drown. It works very well I use it in my kitchen when they get bad!
Reply:Kill them all. Bomb the area. You can find one at your local supermarket.
Reply:I had a problem with fruit flies this summer and got a jar and put vinager in it and with in days i got rid of the problem
Reply:you have to take out the stinky trash every day, that causes fruit flies too!