This slime makes a very satisfying sizzling or fizzy sound and is so fun to make and play with. It’s also a great way to make use of old slime.
1. Take 1 cup (250 ml) old Basic White Glue Slime that’s slightly sticky and add four times the amount of shaving cream to it, by volume, so about 4 cups (1000 ml). I find sticky slime works well when making Iceberg Slime, but you may need to add a little activator. Also add in ¼ to ½ cup (60 to 125 ml) cornstarch (see A). Note that if you use two different colors of slime, divide the shaving cream and cornstarch in half and add to each color separately.
2. Place it in a large bowl, preferably made of glass or metal (see B). Let this sit out for 3 or 4 days until a thick layer of slime has dried on the top. Do not touch the slime during this time.
3. Once the layer has formed (see C), poke it. If you would like, peel the top, dried layer off or mix it back into the slime. It will eventually dissolve back into the slime. You can make Iceberg Slime again by adding more shaving cream and cornstarch. This should work for a few more times, but eventually the slime will fully liquefy.
If you don’t have any old Basic White Glue Slime, just make a new batch and follow the same steps.