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If you’re in a hurry, you can speed things along by placing it in front of a dehumidifier or fan on a low setting. Once the gelatin is fully dried, it will curl up and peel away from the plastic sheet. Re-grind these larger pieces for a more uniformly fine-grained glitter. However, if you're okay with more variety in glitter sizes, you can skip this step altogether. Your edible glitter should last for months, but may lose some sparkle over time. Be sure to keep away from water and sunlight to prolong its shelf life.

Summary:
Allow the glitter solidify overnight. Sift your glitter through a sieve to separate out larger pieces. Store in an airtight container or jar.