There could be a piece of food in the trash or even hidden behind the toilet/vanity. Even if nothing sweet is in the room, fruit flies prefer warm, moist places like bathrooms. Fruit flies may also be attracted to any debris in your sink or shower drain.
The main reason you might find gnats and drain flies in the bathroom is from the dampness and moisture that can be found around your bathtub and shower and your air conditioner vents. Before you can effectively kill bathroom gnats, you need to determine what is bringing them into your home.
Sewer fly’s in your house?
How to get rid of Fruit Flies in the house or bathroom
Can you get rid of Drain Flies? Facts and truths.
Frequently Asked Questions
Can flies come out of the toilet?
In some situations drain flies can breed and develop in odd locations such as under a loose floor tile, in the tank of a toilet that is not used often, under a sink where a leaky pipe is located and other odd locations. ... Start searching in that area for moisture that can be conducive to drain flies.