Jimtro wrote: ↑Tue Feb 12, 2019 11:18 pm
I've been experimenting with a 'formosa' oolong. The first time I tried it
the flavor of peaches were almost overwhelming...in a good way

... unfortunately I'm not sure what I did. The next couple of tries have all seemed to taste like wet grass.
Welcome to the forum, Jim. I agree with Bok and have emphasized a portion above that further indicates that it may have been artificially scented. In my experience fruit notes tend to not be overwhelming and are often imprecise. It’s not impossible that an oolong would taste like peaches but they are generally more imprecise. For example, we might describe the aroma as “stone fruit”, which could include everything from peaches to apricots but seldom a specific fruit. I once had a dancong oolong with strong notes of apricot jam, but it was an outlier by being so specific in the stone fruit area of aromas.
Bok is also correct that “Formosa oolong” is probably a low quality tea. “Formosa” refers to the old Portuguese name for Taiwan, but teas in Taiwan are immensely varied and named. “Formosa Oolong” is as nondescript as “American BBQ”, where there are so many cuts and styles for BBQ that calling something “American BBQ” is almost pointless. We couldn’t even tell what animal it was made from!
Imagining the best and that the aroma did not spirit away, I would suggest covering your mug during the steep, provided all other parameters were the same as that first magical steep that smelled of peaches. I feel like this conserves a lot of aroma.
Also, I don’t know how big your teaball is but it may be too small if the tea expands to be tight within the teaball. If so and the tea is whole leaf, you may forgo using a teaball all together and drink the tea with the leaves in the bottom of your mug. Otherwise, use a larger teaball.
HTH