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"How often should I clean my makeup brushes? And is it okay to use regular hand soap?Wash them once a month, but upgrade your suds, says Ranella Hirsch,  clinical assistant professor at Boston University School of Medicine.  The detergents in hand soap are harsh and can strip the brushes. Instead,  use a drop of baby shampoo to create a little lather, then rinse and air-dry."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cosmopolitan.com/style-beauty/beauty/how-to/a799/how-to-clean-your-makeup-brushes-0110/>