Never had that problem, but after every bag (usually around a half an oz.) I soak mine in alcohol and make some ISO hash. Good stuff, especially in the bong!
AspenGrow Reviewed by AspenGrow on . VaporBros, preventing stuff sucking through? So far I have tried trimming a screen and implanting it in the end of the hose near the mouthpiece... Currently am trying a folded strip of paper to use as a roach type screen... I just hate when that brown hash-like material that collects inside the hose keeps getting in my mouth and lungs.. I have actually accidentally inhaled it on a few occasions... yuk help peace Rating: 5