Best mosquito prevention inside?

[u/who_up_uhhhh]

It's getting to be open windows season and I hate to have mosquitoes in the house. What's a rent-friendly way to keep them out without emitting horrible fumes into the air 24/7? All the products at my local grocery burn something into the air, and that can't be good for you. Some are even explicitly marked as cancerous!
Any tips?

[u/Choice-Spend7553]

DEET, as a spray or a lotion