Since the middle of May the first level of our home has had increasing numbers of fungus gnats on just about every window sill and on the bathroom floors. At first it was just a few gnats in a couple of windows but now 5 windows on the north side of our house have hundreds of gnats each every day. Most of the gnats seem to be dead but there are quite a few flying round the windows. We have no house plants in the house. Our house was built last year and completed on July 3, 2017. We never saw any gnats in the house until this problem started. Paramount Pest Control treated the drains and fogged the house but within days the gnats were back to what they were before. The next week Paramount came back and sprayed around the foundation of the house but this was the day before we had 3.5 inches of rain. Again, the gnats were unaffected. Our house has lawns around all sides with some mulched areas against the foundation containing various plants like roses, ornamental grasses, etc. My questions are: 1. Looking at the included photos, are they really fungus gnats? 2. Assuming that the gnats are getting in from the outside, what is the best treatment for getting rid of them long term? Thanks for any help with this problem.