Overtime as you use your bong residue will build up and it will need to be cleaned. To get the best out of your herbal mixture we recommend cleaning you bong after each use. Headshop World stock No1 Bong Cleaner which can be used on your glass or acrylic bong and also your pipes as well. Key signs that your bong needs cleaning are, resin build up, slimy residue on the inside of the bong and discoloured bong water. No1 Bong Cleaner restores your bong as if it were new ensuring you receive a good clean smoke. We also stock a range of cleaning brushes to make cleaning your bong even easier, our slim cleaning brush gets into all those hard to reach places while our fat cleaning brush works the shaft to remove built up grime.