How do I destroy all the flies

I recently moved to a more remote area, think farmland, and have never had such an intense problem with flies in my life. I think I’m like 76 percent raid with the amount I inhale. I somehow wake up with probably 50 flies in my common space. I’m going absolutely insane killing flies. I just need something to deter them every time we open our front door. Like 3 come in. I can’t keep going through a can of Raid every 7 days. Any ideas or hacks to keep them out of the home? Any candles or scents they don’t enjoy?