I grew up somewhere where it didn’t cool down a lot at night and the only solution was to sleep in front of a fan. Sometimes I could get the fan to blow directly into the sheets and sort of balloon them out which was pleasant. Where I live now it cools at night so I can open the windows at night and close them up during the day. Sometimes I close the curtains too if it will be extreme. I open the windows and create a cross draft when it cools down. Those ice/fan pseudo a/c setups don’t work well.