It may not have been a yeast problem although certain yeast are supposedly
more prone to have this problem. I believe the yeast that some blame is
Montrachet.
It is more likely due to a reductive environment - ie your wine sitting on
the gross lees too long. Fine lees can be beneficial to aging a wine but
the 'gross' lees (those containing pulp debris) can cause the problem you
describe.
> IF YOU ENJOY YOUR HOMEMADE BREW/WINE, DON'T EVER USE ZICAM!
I'd call that damned good advice, even without the "if".
Zicam is one of those "remedies" which are labelled as "homeopathic"
simply so that they can sneak around most of the laws required FDA or
other government approval.
Don't ever use it. Don't ever use anything labelled homeopathic,
either- it's either not really homeopathic, or it won't do anything
anyway.
Sorry to hear about your loss of the sense of smell.