ZEN MASTER PIPE CLEANER Biodegradable Resin & Odor Eliminator Formula Reviewhttp://tinyurl.com/nxb4mh9 ZEN MASTER PIPE CLEANER Biodegradable Resin & Odor Eliminator Formula Use on Pyrex glass, metal, ceramic, vaporizers, hookahs, smoke pipes, water pipes, plastic, and acrylic.Easily restore any dirty smoke piece like new!No scrubbing requiredOdor Neutralizer and Breaks Down Resin BuildupNon-Toxic / Biodegradable