Whether you like to clean your glass after each use or once you can't stand the smell, the 99% Isopropyl Alcohol Cleaners will get rid of any amount of gunk or build up! This line of products offers three different formulas to cater to your individualized cleaning needs. The ISO Clean solution is a multi-use cleaner, great for quick spot cleaning or a good cleanse for the areas that are harder to reach. The Soak & Clean solution is enhanced with D-Limonene, a natural chemical made from orange peels, that will have your glass gleaming after an effortless overnight soak. The Shake & Clean solution is this brand's heavy duty formula which is made with abrasive salt so you can fill and shake your pipe clean in just 60 seconds. Sold individually.