I cleaned this office which has about 1000 sq ft of commercial carpet. It was extremely dirty and soiled.It also had a water ring as you can see in one of the photos. This carpet was not cleaned in 20 years! (You can see the difference after I cleaned half of the room in the photo) The water ring came off with DryMaster Sodium Bisolfite. I charged $50 to remove the water ring and $571 for the cleaning.
Customer was extremely satisfied and will give me more work in his other locations
Charley Adame, North Texas DryMaster