I've left my window open all week, and it's been great. I've not had to turn the fan on to sleep for the last couple nights which is even better. It was colder than I liked yesterday afternoon after I finished working, but I'd been sitting all day in front of the open window with the heating/AC unit fan also blowing air. But by 6 pm or so, it was fine as I'd warmed up away from the window, and I slept like a baby with just my normal blanket.
It does need to be a bit colder though, as I've had stink bugs hanging on my screen teasing Tsuki. Fortunately, they haven't yet crawled inside, but she's going nuts trying to get at them through the glass.
I really, really hate the brown marmorated stink bug. But, the Spotted Lanternfly is far worse, and they showed up in masses last month in Center City. I have never seen hordes of bugs a thick as these ... and they were everywhere on the sidewalk. For several years, we've been warned that "this" is the year swarms of cicadas will appear, but I've yet to see any of those hoards. But while annoying, the cicadas are harmless. Not so with the invasive insects!