420 Science Smoke Soap is an organic cleaning solution that is extremely tough on resin and residues but very gentle on the skin. 420 Science Smoke Soap comes in 2 sizes, 8. fl. ox. (236 ml.) and 32 fl. oz. (944 ml.).Smoke Soap is double concentrated so you can dilute it with an equal amount of water. It is biodegradable and reusable! Use it on glass, plastic and metal – your favourite paraphernalia will be as good as new and taste completely clean. It contains no harsh chemicals and is environmentally friendly.User instructions:Dilute 50/50 with water.Soak your pipe or fill your bongAllow to rest overnight OR use in the microwave for faster results – WARNING: DO NOT PLACE METAL PIPES IN THE MICROWAVE!Rinse with warm waterSmoke!