Any idea on how to cool down an apartment?

The-littlest-dreamer
It's 90 degrees in our place and the same outside. We have a window AC unit (that's set at 60 degrees) but it's not strong enough to cool the apartment down.

We take cold showers and have frozen rags/shirts to cool
us down. So far that works but we can't keep that up for long.

Its getting hard to sleep, cook and even breathe.

It's a small studio like apartment on the second story.
Any idea on how to cool down an apartment?
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