Dirt, dust, sand, dead skin cells, pet dander and much more can cause your carpets to get dirty. If these mineral deposits are ignored, they will become a breeding ground for harmful microorganisms. These unwanted bacteria can trigger coughs, asthma and other illnesses. Furthermore, small particles can damage your floor coverings overtime due to their abrasive properties, leading to possible repair or replacement. This could have been avoided if you had just cleaned your carpets.