4. Clean Cooling Devices

If you have ceiling fans, change their rotation to clockwise to push warm air down (usually accomplished by flicking a switch on the base), and while you're at it, wipe down the blades with a microfiber cloth that traps dust. At month's end or when the temps drop, remove window AC units. Vacuum the coils and filters, and store them in a cool, dry place, preferably covered to keep out dust and bugs.
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