ventana is very well aware of the leaking dispenser problem.....they've been working on it for at least 4yrs that i'm aware of (that's how long i've been reporting problems to them).  they've changed the dispenser design at least 3 times that i've seen.....sounds like they need to keep working on it.....
ventana users should never trust the machine when it tells you how many uses are left in a dispenser.....always visually check to be sure you have enough to complete your run.
carrie kyle-byrne
cahfs-ucdavis