Alright, been meaning to ask this for a while now.
I have a bottle of Hibiki 17. Like the rest of my bottles, it's kept in a dark cupboard away from heat and light. Yet quite often I find condensation forming on the upper part of the bottle (if you've seen the decanter shape of the Hibiki bottles you'll know what I mean... where the neck broadens out into the width of the bottle). Have no bloody idea how or why this is occurring! The stopper still seems quite tight... not really sure what's causing it. Anything to be worried about?
Edit: You know, I could make this problem go away if I drink it a little more vigorously... that'll well and truly solve it.