Windows Tabletop How Do I Keep Cool While Sleeping Without An AC?

How do i keep cool while sleeping without an AC? - windows tabletop

How do I keep cool during sleep without AC. I'm only 18 "in diameter. Ventilator office during sleep and my room quite a lot of furniture (though not completely), and the fourth course is very hot. In addition to my wooden building is isolated from, yes, of course, it is very hot in summer. I try to open the windows, but sometimes it works. somehow, I keep fresh?