actually works!
I was super skeptical of this product and its competitors, but I am pleasantly surprised to report that it actually does help reduce rez build up! Of course it doesn't completely eradicate it, but if you change the water daily (or at least every 3 days as directed) you'll notice that instead of sticking to the sides of your bong, the build up slides back into the water where it stays (again, as long as you are cleaning regularly). I love that it is completely organic, made from nontoxic fruit extracts, so I don't have to worry about inhaling any chemicals that I didn't intend to. It does change the color of the water, but hey, so does smoke so that shouldn't weigh much on your mind. After using it with my new piece I have yet to see any water line or smoke staining, and it has been used daily for over a month now! Simply put: I love RezBlock, it helps your glass stay clear, clean, and shiny, and is totally worth the small expense!
Rating: 5 stars