If they aren’t breeding inside, they’ll be dead soon either way. BT (dunks) only work in water. Applying a broad spectrum pesticide is simply more work than it’ll be worth. A few make it inside before winter and soon die off, same as a lot of bugs. I get a bunch of spiders, crickets, cave crickets, and a few earwigs in early winter in my basement.
How many mosquitoes we talking about? Debate about what’s appropriate for “medicine” aside, they aren’t breeding in/on your plants; moot point.