I'm a lover of Bai Hao Yin Zhen (Silver Needles) and it's pretty much the only tea I drink nowadays.
Well I ran out of my 2 Dove Silver Needle that had sustained me over the last couple years, so I went to the health food store and bought a canister of Silver Needles from Republic of Tea. It tasted delicious, with slight banana undertones and the marked sweetness that I love so much in Yin Zhen. Well I decided to store the cannister in the fridge to prolong its freshness. It remained there for a week or so, and still brewed up to taste wonderful. A few days ago, on a whim, I took it out of the fridge and have been storing it at room temperature. Now, for the last couple days, when I brew it it's lacking flavor and has little to no sweetness. I find this really upsetting because the characteristic sweetness is what I love most about Silver Needles. I read in a Mary Lou Heiss book that temperature changes are bad for tea...but I didn't realize that such a minor temp. change from fridge to room temp. could zap all the flavor out and so quickly. I occasionally stored my previous 2 Dove Silver Needle in the fridge and "decanted" it into smaller containers kept at room temperature and it never lost its flavor.
So I'm wondering: Has anyone ever experienced flavor loss or other bad effects from storage issues? I can't imagine what else to attribute the flavor change to...And it happened so quickly.