Specialty Spot Removal http://www.protechcleaning.org/apps/photos/ Specialty Spot Removal Subsurface Spot Removal Usually found in homes with pets, a dog or cat will at some time have an "accident" and standard carpet cleaning wont reach down far enough to get the source of the odor problem, This diagram illustrates how a subsurface issue is resolved and sanitized. http://www.protechcleaning.org/apps/photos/photo?photoID=25329230 25329230 Subsurface Spot Removal Usually found in homes with pets, a dog or cat will at some time have an "accident" and standard carpet cleaning wont reach down far enough to get the source of the odor problem, This diagram illustrates how a subsurface issue is resolved and sanitized. http://www.protechcleaning.org/apps/photos/photo?photoID=25329231 25329231