I have sitting in my fridge some WPL400 that was top cropped from a batch of Belgian wit. It has been sitting in the fridge for about 7 months. Certainly most of the yeast is not viable (dead), and so I would like to separate the living from the dead. Can this be done with yeast washing (about which I know practically nothing)? If so, can someone explain how to do this (or post a link to a decent link)? Or should I just go with some fresh yeast? Thanks!