Inspector Hector first came on the scene with their plaque detector: a product that claims to make kids brushing fun. You may have seen the TV commercials of kids spitting their mouthwash out and seeing the 'remnants' wash down the drain. Plaque Detector is a pre-rinse that stains plaque blue so kids can see what needs to be brushed. Frankly, when I saw the commercials I was rather grossed out. But, we tried it anyway... once. The kids have a marble sink and couldn't see the spit. Needless to say, my son was very disappointed--anything potentially gross is cool to him. NOW, Inspector-Hector has a hand-soap called "DirtDetector". It's so new they haven't found time to put it on their website. But, it's basically the same concept of their other products: it changes colors when kids hands are clean. Maybe we'll try it, maybe we won't. So, how do you think they do it? It has to be some sort of chemical reaction. How can their claims be challenged and is it safe? Any ideas? Let me know.