If you have radiators, especially in older homes, that are exposed and collect hard-to-reach dust behind them, try this: hang a damp towel or sheet behind the radiator. Now, using a blow dryer turned to the coolest setting, blast the air from the front of the radiator. Dust and debris clinging to the unit will be transferred to the towel. All you’ll have to do is shake the towel out and toss in the washing machine!