I HATE FLIES

I know you shouldn't use the word hate. But I HATE FLIES, obviously since I have stated it twice already!

I have waged my own natural war against them. At least in my own home. I am trying to keep with our all natural low processing, no pesticides lifestyle in my battle so below are some of my solutions.

I have tried the fly flap (aka the fly swatter) front. I've won a few battles on that front. 

I am doing the hang a bag of water over the door with pennies in it. It is supposed to help persuade the flies not to come in because the bag is supposed to look resemble a hornet nest. Apparently flies are afraid of hornets, and this keeps flies out.

Picture via http://www.commonsensehome.com/

My next attack will be the bait method. Cut a 2 litter bottle at the bend. Set the lid off to the side. Place a piece of water soaked meat in the bottom of the bottle. Put the lid (without the cap) inverted into the bottle. Tape around the edge of the lid and bottle "sealing" it down. I'm not sure if you have to hang it or not, but I'm going to try both ways (which means I'll have 2 of these traps).

Do you have any methods you've tested to be good?