Just got a message from the makers of Vaporgenie and thats what they said 
sorry you cannot use water, alcohol or vinegar to clean the pipe. Scrub 
more vigorously, or use two or three pipecleaners side by side. 
We will soon be offering stainless steel scrubby pipecleaners, but we 
dont have them yet. 
dan 
 Hi, i own a wooden vg and its starting to stink ,i have pipecleaners ( 
 wire with cloth around it) but i dont think it will be enough to clean 
it.Can i use alchool inside the pipe or vinegar or just boil the whole 
 pipe ? 
Swim is a figment of your imagination and he's a compulsive liar,thus everything he says is pure lies !