Keep It out of Direct Sunlight
Sunlight is the No. 1 killer of whiskey. UV light not only dulls the color of that beautiful mahogany booze, but it also breaks down compounds within the whiskey itself, causing it to turn somewhat rancid. Unlike beer, which is housed in dark bottles to protect the liquid from skunking, whiskey usually comes in clear glass, so the booze is totally helpless against the sun’s destructive glare. While your whiskey won’t stink quite as bad as skunked beer, the taste will be noticeably harsher after a few months by the window, with flavors of rubber, paint thinner and rotten fruit.