If your gummies are overly tacky, ensure the final pH is at or below 3.5. If gelled enough to remove from the molds, a high-pH gummy will be very tacky.
It is the safest practice to allow the gummies to cure for 24 hours at 30-35% room humidity and 70*F before sugar coating or packaging them. In some cases, packaging the gummies before they have fully cured will capture the moisture being sweat out and this will make the gummies look wet.