I got this tip from America’s Test Kitchen.  I love their show on PBS when I get to watch it.

KITCHEN TIP: Best Storage for Maple Syrup and Honey
Opening your pantry to find your costly jar of maple syrup spotted with mold can be frustrating, especially when the honey sitting next to it remains perfectly fine. The reason? Due to its high moisture level and lack of preservatives, maple syrup is susceptible to molds, yeasts, and bacteria. Once opened, a jar will keep six months to a year in the refrigerator. Honey, unlike maple syrup, has a naturally low moisture content and can keep for up to two years (I’ve heard honey has no expiration) at room temperature in a moisture-tight container. In fact, don’t ever refrigerate honey, unless you want it to crystallize and turn grainy.

Have a “Sweet”  Day!