Any reccomendations for low effort methods for ridding my house of flies?

I live in a old farm house, so stopping them from entering is difficult.

IME those electric zappers with a blue light work extremely well.

They have the added entertainment value of making a very satisfying and reassuring zapping/frying sound each time they make a kill.

We have the same issue. Old farm house, middle of countryside next to a farm.
We use one of these on the kitchen door way, works well.

As above, they work well. Well, that is if you get a decent one. I went cheap and it fell to bits

Thank you, any recommendations for a good one?

Bury the bodies deeper.

https://images.app.goo.gl/rZxPy2aZNyFr39Ms7

Might not qualify under low effort but stalking the little buzzers and killing then is fun