Strategies include the following: Removing items that collect dust, such as knickknacks, magazines, books, and soft toys Using synthetic fiber pillows and impermeable mattress covers Frequently washing bed sheets, pillowcases, and blankets in hot water Frequently cleaning the house, including dusting, vacuuming, and wet-mopping Removing upholstered furniture and carpets or frequently vacuuming them Replacing draperies and shades with blinds Exterminating cockroaches to eliminate exposure Using dehumidifiers in basements and other poorly aerated, damp rooms Using high-efficiency particulate air (HEPA) vacuums and filters Avoiding food triggers Limiting pets to certain rooms or keeping them out of the house Adjunctive nonallergenic triggers (eg, cigarette smoke, strong odors, irritating fumes, air pollution, cold temperatures, high humidity) should also be avoided or controlled when possible.