Years back my brother decided to make some beer....bottled and capped it. the directions for storing was to leave space between bottles at least the lenght of the bottle...bah humbug he said and didn't pay attention to the spacing and one bottle in the middle of the shelf exploded and started a chain reaction up and down the line....his basement smelled like a brewery for weeks...lost all except a couple of bottles....when all else fails follow directions....
Hubby use to make his own Kahlua and it was as good as any you could buy...he loved Kahlua and cream...