What you need:
- ziplock sandwich baggie (with no holes)
- paper towel
- 2 tablespoons baking soda
- 1/2 cup vinegar
- 1/4 cup warm water
WARNING This should be done outside. (unless you want a baggie full of vinegar and baking soda to explode in the house)
Place baking soda in the middle of the paper towel and fold it up.
Pour the vinegar and water into the sandwich baggie.
Quickly place the paper towel in the baggie and zip that baby up. Give the baggie a little shake.
Put the baggie on the ground and stand back.