If it's just a dry taste, it may be just that "new cotton" flavor. Give it a day or so at a low-ish wattage and see how it does. My bet is that the odd taste goes away.
Rant: This Japanese Organic Cotton Craze is fueled by a belief that it's the purest form of cotton evah; that nothing wicks better; that gone are all the chemicals... yada yada yada. Any processed material is going to retain properties imparted by how it was produced.
And, if it's really organically grown, the properties that material had before processing will vary from crop to crop and plant to plant.
The question I've always had: Just how big can an organic cotton farm be on an island nation of 128 million souls with an arable land area that's one-third the size of Sweet Home Alabama?