I should clarify. Old sandalwood wood that was old to begin with, which I think Mr. P had, does not improve with time but gives up its scent over the years. If you let it sit out, say 10 years, the scent upon putting a log to your nose is quite reduced. Powder sitting out, well, that is almost scentless after a long time. However, my comment assumes that the chunks were not stored in a manner that conserves scent. If you seal that puppy up, it will retain its scent much longer. That's why I love mason jars.