If applied appropriately by a trained professional, carpet protectors can provide unparalleled results. Carpet protector is design to encapsulate the fiber with a protective Teflon coating, keeping the fibers from picking up day to day soiling and or allowing nasty stains to dye the original color. Many newer carpets come from the factory with a protector already applied that generally lasts 1-3 years or as many steam cleanings. A protector that has been applied after the carpet has left the factory should be reapplied following every cleaning but only by a trained professional.