I thought door to door marketing was in the past but this past summer I was pleasantly surprised by a door to door saleslady who was selling Dirt Buster. Well, it was hot and I just couldn't give her the brush off without at LEAST hearing her out. And I'm glad I did. She claimed that her product (which has virtually no smell) could clean ANYTHING! After her sales pitch, she informed me that the price was "only" $20! YIKES! I am a penny pincher so that sounded like quite a bit for me. Guess she saw my surprise and explained that the product is concentrated and is generally used at a 1 to 20 strength. So, I told her that if she could get the spot off my living room carpet, then I would buy a bottle from her. I thought there is NO WAY it would work! I had used 409, shot, carpet cleaner, steam cleaner, and I can't even remember what else. But the RED lolly pop die was still in my off white carpet! Just 5 minutes later the spot was GONE! And I was sold on the product forever! I use it on my linolium floors, carpet steamer, counters, showers, tubs, siding (mildew), walls, etc. I just love this product! And about 4 months later, I have only used about 1/5 of the bottle!