My straight falcon seems to have been very hot of late and I've also realised that the mouthpiece will turn. I'm not certain, but I thought it was supposed to be fixed to the humidome? The thin central tube of aluminium is attached to the mouthpiece, but the end where the tube passes into the humidome seems definitely loose and unnatached. I can turn the mouthpiece around and the tube turns around with it. Could anyone tell me if this is how they are supposed to be or if something has gone wrong?