Cooling the Room with Evaporative Methods
One surprisingly effective method involves a technique often described as low-tech yet scientifically sound: draping a damp towel over an open windowsill.
At first glance, this may seem improvised, but it works based on the principle of evaporative cooling. Evaporation is a natural process in which water absorbs heat from its surroundings as it changes from liquid to vapor.
As air passes through or over a wet towel, heat is drawn from the air, producing a modest but meaningful cooling effect.
The setup is simple: soak a towel in cold water, wring it out lightly so it is damp but not dripping, and hang it across the top or bottom of an open window.
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