No one wants a dirty bong so make your mother proud and keep your bong spick and span. You will need iodized salt and bottle of rubbing alcohol aka isopropyl alcohol. These items are very inexpensive. Apparently you can really shine up any glass with this stuff. Use half a bottle of the alcohol for the body and the rest to clean out the pieces. This will clean even the grungiest of equipment as this video will attest to, although, we didn't get to see the before shot.