PROBLEM!!! Two years ago we purchased a 10 yr. old home that has become a disaster in the summer and the fall due to hundreds of stinging insects. We have used countless cans of hornet and wasp killer, but they kept returning. After spraying, I would find nests behind all shutters, overhangs etc. The surrounding deck outside has aprox. 100 ft. of railing that channels at the top to cover the posts. I'm sure that I have not found all of the nests, but so far I have discovered over 200 small to medium nests, majority being under the deck railings. (had to remove one side of the deck channel so as to better view and remove the nests). ----Flies, well the garage is very clean but there seems to be a problem with an over abundance of flies that concentrate on the windows. I don't think a pest strip is going take care of these rascals. Thanks in advance.