Who knows a good way to make popcorn crisp again?

In order to make popcorn brittle, the materials prepared include: container, microwave oven, refrigerator and plastic bag.

1. First, put the popcorn in the container.

2. Put the popcorn in the microwave oven.

3. After heating for 4 minutes, the popcorn will become brittle.

Popcorn can also be packed in plastic bags and tied tightly at the mouth of the bag.

5. Freeze in the refrigerator for 24 hours.