of fly paper! we buy it and have it hanging in several rooms. it does take a bit to get used to seeing it hanging with flies stuck on it, that’s not the greatest, but it has been the only thing that has worked here. i personally don’t like using fly spray, but when the last ditch desperate spray would leave the flies still alive, that’s when the fly paper first appeared in the house.
hi jo, you need to get it really melted to spread it on – should be okay on a very hot day. i just used an old paint brush but you could also use a spatula 