apple cider vinegar + dish soap (fruity or neutral smell) + granulated sugar. mix and leave out. works nicely, no heavy chemicals, just empty it out when it fills with fly corpses.
do you have a similar trick for mosquitoes because they’re breeding or some shit outside my bedroom window and i wanna be able to open my bedroom window
try keeping fabric softener sheets around you to keep them away, seems to work mainly anecdotally!
my fam usually hangs a bag filled with apple cider vinegar & water off of a tree branch to keep mosquitos away while bbq! smell of vinegar is as effective as deet
also you can make a mosquito trap with yeast, sugar, dish soap & water. place the mix in a jar with a funnel on top so they can travel in easily but are stuck within the container for long enough to stay stuck
People in the country fill up a ziplock bag of water and put a penny in it and hang them all over the place. They really believe it works but I have doubts.