Mold and bacteria can settle deep into carpet fibers. These biological microbes are alive and thriving, and if your carpet remains dirty, they will continue to grow. Did you know that conventional shampooing methods will cause re-soiling due to lack of rinsing and extraction of the chemicals used? Spots and stains will resurface because they were only pushed a little deeper. Sand, dust and other particles that get embedded in your carpet will cause abrasion of the fibers, making the carpet look dull. Light no longer reflects properly as the tips of the carpet tufts plume, causing a shadow effect – permanently. This can be prevented by annual professional steam cleaning!