Certain household fabrics can trap chemicals and allergens such as pollen, dust mites, animal dander, and mold, according to the Asthma and Allergy Foundation of America. Experts are warning that some fabrics, which should be washed more frequently, are often overlooked. Those with eczema or allergies to dust mites, animal dander, and mold should be especially diligent in washing fabrics, according to Melanie Carver, chief mission officer of the Asthma and Allergy Foundation of America. Scott Grillo, a laundry expert at FurZapper, noted that people often underestimate how much fabrics throughout the home collect hair, dust, allergens, and odors. Carpets should be vacuumed weekly, according to the Asthma and Allergy Foundation. Those with allergies may consider replacing carpets with hardwood or other solid flooring if possible. Curtains and drapes can collect dust, dander, odors, and other allergens. Cleaning them can help maintain color and shape while improving indoor air quality. According to Matt O’Connor, CEO and Founder of No Scrubs Laundry Delivery Service, light curtains should be washed every 3-4 months, while heavier drapes can typically go 6 months to a year between cleanings. Shower curtains and bath mats should be washed every 1-3 months. Melanie Carver recommended leaving the curtain fully stretched out after showering, running an exhaust fan, or opening the bathroom window to reduce mold growth. It is also recommended to avoid using bleach, instead using soap or vinegar and water. Throw blankets and pillows should be washed every 1-2 weeks. According to O’Connor, they accumulate dust, absorb oils from hands and hair when people lean against them, and can harbor allergens. Washing removable covers keeps them fresh, maintains their appearance, and creates a healthier living environment. Cushion covers should be washed every 2-3 months, or more frequently if they're on heavily used furniture. Kitchen towels and dish cloths were found in a 2015 study by Kansas State University to be the most contaminated items in kitchens. Better Homes & Gardens recommends washing them daily or after a single use if used for cooking purposes. Pet beds are one of the biggest hidden fabric offenders in the house, according to Grillo. They trap fur, dirt, odors, and allergens constantly. Removable covers should be washed weekly, or at minimum every other week. PetDirect recommends washing dog beds every week and cat beds every 1-2 weeks. Bed pillows should be washed every 3-6 months, according to Scott Schrader, a laundry expert at CottageCare. Pillow inserts soak in sweat, body oil, and dust mites just as much as pillowcases. Stuffed animals can hold allergens the same way as other fabrics. Carver recommended washing them monthly. For items difficult to launder or that cannot withstand hot water, vacuuming with an upholstery attachment can remove dust mite carcasses and waste.