This is a subject that really should be both understood and explained to homeowners by professionals before providing service in many areas. In the carpet and upholstery cleaning field, I see this quite often and I also realize even our industry does not do enough to educate the consumer. Pre-existing conditions usually refer to conditions that are present before the onset of any work onto a particular project. An example of this could be a plant that is on a rug and the plant is watered ...