GREENSBORO, N.C. — When the trees start to bloom, your allergies kick into high gear. That's all outside. But how are you dealing with allergens inside your home? You need to clean your home.

And it's not just good for your allergies. A study published in the Journal Of Environmental Science and Technology found some house dust might contain harmful chemicals too.

First, vacuum Well and often. Your carpets can hide dander, pollen, even cockroach droppings. Use a HEPA filter if you can. The traditional bagged vacuum, that needs to be dumped, can release the allergens back into the air when you empty it.

Next, consider using air conditioning more often. Open windows are an easy way for allergens to get in. Air conditioning also cuts back on humidity - mold and dust mites thrive in damp environments. And if you have a window unit, clean the filter often.

Finally, consider an air purifier. A new study suggests a portable air purifier can give some relief. But Consumer Reports says, avoid ionizer or electrostatic precipitator purifiers. They release ozone which can irritate your lungs.

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