Review on Green Piece Cleaner: All Natural 16 oz Glass Cleaner with Free Travel Size, 4 oz Refill, and Pipe Cleaner - Perfect for Water Pipes and Bubblers! by Shawna Williams

Works well, now I can see all the original colors! Just put it in a ziplock bag and pour some solution inside. I apply just enough to cover the pipe and shake well, then leave for 24 hours, then scrape off any residue and rinse with hot water, then let dry. If you need a quick clean, just follow the directions on the bottle. The only thing I didn't like were the small brushes. super thin So I recommend soaking the product so you don't have to scratch a lot. FYI - if you don't soak, you're just using a lot more quick cleaning solution 😉