Why are in that so masses flies? My house is full of flies that are black and probably blue...

My house is full of flies that are black and probably blue bottles. Why are there so many contained by my house when there is no meat around for them to lay maggots in? I want to catch a electric fly zapper but will they be attracted to it? Please help there is three on my eyeshade right now.
Saw this contained by a restaurant. Hang a large bag of hose near where the flies congregate. It wig them out and very few come around. Those you can bag near an old fashion fly swatter. Fun when you are bored. Flies are terribly well known for trying to find a place where it is cooler than outside. They will also come in if you own recently cooked as they smell it. Any type of animal (cat/dog) food will attract them as well.


Get a Venus Fly-trap! Just be carful essential it. Electric fly zappers aren't too good from what I've heard.

I would suggest a fly-trap near bait inside, just the entrance is only one-way.

Or, basically bring a few spiders in the house! That is the cheapest way!
Answers:    Hang baggies filled in the middle with water at your doors, This will almost do away with them from coming in. Spray everything you can with the regular (amber) Listerine (mix 1/2 Listerine to 1/2 hose down in a spray bottle). They won't come near it. This you may hold to repeat daily as the Listerene will evaporate. At least it keep them out of your kitchen etc. tll you get them stopped. You can also spray yourself if you are being bothered. Good luck!