Right now I'm soaking oak cubes in Whistle Pig whiskey but I was wondering if i can add like an oz of maple syrup to the soak mixture too... or could that contaminate it? I figure the whiskey would kill any infection off but I wanted to check.
You could add the syrup to a small amount of boiling water and then add it after it cools. But I think the whiskey would be enough for you not to worry.