A while back we had a lot of fun ridiculing Jeff about how he could taste acetones in his bourbon, but here's the rest of the story. It took me a long time to get to the bottom of this because when someone tells me something, I don't let go until I get to the bottom of it. Jeff was exactly right. Acetones (fingernail polish remover) comes from the esters and the fusel oils. Too much fusel oils can become a banana like taste, among a host of others. If these are not balanced, and it doesn't take very much - minutes part per million-you get acetone (fingernail polish remover). This is a very small amount, but the human taste can definitely pick them up and this can happen in any bourbon. The way to get rid of it is to distill at a higher heat, but this becomes tricky also-too much heat and you lose all your flavor- too little heat and you get all those unwanted congeners, which can cause tremendous headaches. This is where the master distillers can identify this problem the very minute it starts, know where to look for it, and how to fix it. I could get into a lot more detail, but basically that's it. And to Jeff, congratulations - you were exactly right.