Better to open the case, use paper towels/toilet paper to soak up as much liquid as you can from all electronics and plastic parts that easily stick together. Sugar and Aspertan aren't friendly for circuitry. After he soaking up part leave the device open and air-dry the device. Use a fan, but never ever a hair-dryer or any other device that blows heat and air. If you decide to use a fan, 'tornado'-mode is not necessary, just a slow and steady stream of air.
Still it would be best to wait a day before you re-assemble the device again. The above is the pound of cure. The ounce of prevention would be the discipline to not use beverages near electronic equipment.