How to kill flies?
I bought a fly bag from Home Depot which works great! https://www.homedepot.com/p/RESCUE-Disposable-Fly-Trap-FTD-DB12/100083352
What kind of flies? Fruit flies?
For regular flies I use a fly swatter. My husband and I turn it into a game.
Hi Erlinda: Here are a couple of sites that may help: