I had to post this video of a filthy carpet cleaning. It's always satisfying to watch something come clean and this video is no different. To watch all those layers of dirt come off the carpet is oddly soothing. I put out a commercial carpet cleaning video sometime back that had similar results. If you want to talk about filthy carpet cleaning, commercial carpets are by far the filthiest out there. Every time I clean a commercial carpet in Tampa FL it seems to have layers of sand and soil that needs to be removed with several cleaning passes, like this video.
If you have filthy carpet it most likely can be cleaned. I can't tell you how many times I've cleaned carpets that were thought to be beyond cleaning. You would be amazed at what we can do to bring filthy carpets back to life.