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Look for and remove any outdoor sources or nests. Clean carpet beetle-prone areas frequently. Seal unused fabric and clothes in plastic containers. Choose synthetic materials over organic ones.
To make sure no carpet beetles can return, check your screens and doors for holes and keep them closed as much as you can. Look outside and throw away old spider webs and nests from birds, rodents, or bees, which carpet beetles can hide in.  You should also examine any flowers or plants that you bring inside for signs of carpet beetles or larvae. If you see any, leave the plant outside. For a particularly stubborn or recurring infestation, you can spray liquid insecticide around the lower outside portion of your home and near entry points. Insecticide can affect other, non-harmful bugs, though, so only apply it outside as a last resort. Vacuuming carpeting and washing your clothes and other fabrics frequently, at least once every 2 or so weeks, is the best way to prevent a carpet beetle infestation. Treat spills and stains immediately as well; food and sweat stains on fabrics can attract carpet beetles. Make sure to keep hair, lint and dust bunnies to a minimum, as carpet beetles like to feed on these. Store off-season clothes, fabrics, and starches in sealed plastic bags or containers. Air them out in the sun and brush them at least once a year to check for an infestation.  For extra protection, layer your stored fabrics with resin strips filled with insecticide. You can also use moth balls, flakes, or crystals. If you do find an infestation, wash or dry clean the items before storing them again. Carpet beetles will only eat organic products, so choosing synthetic materials will lessen your chances of getting an infestation. This is especially helpful for carpets, rugs, and furniture.  Synthetic materials typically used for rugs and carpeting include nylon, polyester, triexta, and olefin. For furniture, synthetic options include acrylic, acetate, nylon, and polyester.