So I WANTED TO TRY THIS...BUT THEN IT RAINED REALLY HARD right when I was ready to run to the store! So, I gave up, went inside, and found a bottle of Vanilla Fields I got as a gift 2 years ago! (wasn't driving in another storm on my day off!) SPRAYED THE PORCH LIKE MAD!!!! All the chairs, the wood, the plants, myself, the dogs (they were in the way)The flies were far less today than yesterday (I sit out there a lot) - not totally gone, but by far much more tolerable! We have a covered porch, and with the rain all week, the flies have been congregating up there, doing conga lines, tap dancing, having tea parties - can't blame 'em, it's wet in the yard! SO IN MY OPINION - this is a win! PLUS my porch smells YUMMY! Once that bottle is gone, I may invest in some cheap vanilla smell good from the dollar general and see how that goes....