pre-congr mm on the coming PhD!

it's hard to say whether it gone bad, did you sense abnormal smell?

really! I did not know this before, while I do know the Sandalwood essential oil is relatively more stable than others, in terms of both quality and smell. On the other hand, my blending oil can last much long, especially when save in a proper condition like you do. I agree your assumption and I think you got a great sense of smell!