Re: Cardboard??? WHAT?
Sorry to hear about a waist of shisha and a non enjoyable smoking session. Did you use the original hose that it came with? If so its likely that it may have metal coil wire inside the hose that tends to rust on cheaper hookahs, happend to me after bringing one of my mini's to the beach. Next time you fire up your regular hookah try changing hoses and see if thats what it was, other wise id say find some rust remover let it soak inside the stem for a while and clean it thoroughly with mild soap and water.