This thread is extremely old, but hey let's open the discussion and get this moving. It's a great question, and one that can be answered. I can explain how to clean this on the cheap, or on a professional level. I can explain how to get a cheap professional package together that will get you cleaning tile and grout, better than a brush and some chemical, but you gotta be willing to spend SOME money. Yes it can be done without high priced equipment, but you will not make any money doing it, and it won't be professional quality.