I washed an abbey yeast after my last brew and I want to use it again. I am wondering if it is possible for the yeast to go bad? Beside the obvious that it can be dead, or will not ferment - which I will find out when I make a starter - can it "mutate" into something that will give off flavors? Can you go through the whole brew process and have a foul tasting beer at the end all because the yeast has changed some how? Is there a way to know this from the beginning?
Thanks for any help.
-Joe
Thanks for any help.
-Joe