Hey Marc,
Just as a different suggestion, why not join up to a howeowners forum (if we have them here in Australia, I am sure you would have them in the USA) and post it over there. That way, you can ask more of a sample demographic the same question - ie, they are normally all housewives discussing a variety of topics including cleaning. It might be a good idea to get an idea about what the ladies think.
Personally, I like C.