Vacuum the rug at least once a week. Good Housekeeping recommends that twice a week is best. The suction will pull any dirt or debris from the base of the carpeting to the surface and keep much of the soil or stains from setting.
Blot up any residue from a fresh stain or spill with paper or terrycloth towels. Rub the stain with a wet sponge with a few drops of dish detergent on it to take care of any surface staining.
Clean your whole rug by mixing one cup of 3 percent hydrogen peroxide with one gallon of water. Use a glass measuring cup to measure the peroxide. Sponge on lightly with a sponge mop. You do not need to saturate the rug. When dry, vacuum. The oxygen in the peroxide will remove any dingy yellowish tinges in the rug. There is no need to rinse; olefin is plastic.