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"&amp;quot;Pillows are an important area of the sleep sanctuary,&amp;quot; says Rebecca S. Robbins, a sleep researcher at Cornell University. &amp;quot;Our pillows, just like our mattresses, accumulate dust mites.&amp;quot; Therefore, it&amp;#039;s important to replace your pillows frequently\u2014about every two or three years. Robbins test for telling if pillows have lived their life to the fullest: &amp;quot;Fold your pillow in half and if it doesn&amp;#039;t spring back immediately you have a dead pillow.&amp;quot;  Are you sleeping on dead pillows? Tell us below! This article originally appeared on Housebeautiful.com. "^^<http://www.w3.org/2001/XMLSchema#string>
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