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Clean the Exhaust Fan
If the grille on your bathroom exhaust fan is clogged with dust, try a trick that's faster and more effective than vacuuming: Turn on the fan and blast out the dust with “canned air.” The fan will blow the dust outside. This works on the return air grilles of your central heating/cooling system too. Run the system so that the return airflow will carry the dust to the filter. You'll find canned air at home centers and hardware stores, usually in the electrical supplies aisle.
Caution: The cans contain chemical propellants, not just air. Don't let children play with them.
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Beat and Shake Area Rugs
Vacuum large area rugs at least once a week. But also take them outside three or four times a year for a more thorough cleaning. Drape them over a fence or clothesline and beat them with a broom or tennis racket. A good beating removes much more dust than vacuuming. Take smaller rugs outside for a vigorous shaking every week.
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Do Air Cleaners Reduce Dusting?
An effective air cleaner removes large and small particles from the air in a single room. Within that space, it can relieve allergy or asthma symptoms and even reduce smoke and cooking odors. But don't expect it to relieve you of dusting duty. Air cleaners are sized to filter a small area, so only a small portion of the airborne dust in your home will ever reach the unit. For air cleaners to have a real effect on overall dust levels, you would need one unit in every room.
While you're debating the value of an air cleaner, take care of cleaning your air conditioner, it's easier than you think.