Can't beat that
Get a quart jar. Make a paper cone that is wider than the mouth of the jar at one end, about 1/2" at the other end. Put 1/4 cup water, 1/4 cup of apple cider vinegar, and a few drops of dish soap in the jar. Put the cone in the mouth of the jar, small end down. Wait. Flying insects will fly in and drown.
Thanks! Your answer is awaiting moderation.