I was after 2 lines of reading thinking it must be your hose and as you say ,it is.ould be that once you either washed it and it got rusted or added too much water and sucked up into it a bit of water. You are best off chucking out that hose. Cut off the connecter side and the mouth-piece, go to a hardware store and buy some pvc clear or coloured tubing as long as you want. Keep in mind that the pvc is not as flexible as a regular hose and can flip over an un-anchored hookah. But its good if you want a long hose that can be washed endlessly.Order a new hose. When you go to attach the mouthpiece and holder heat lightly the ends of the pvc tube stick the mouthpiece and wait for it to cool and contract a perfect fit!