iIIf How to save and store your Wonder Slime:

First rule of keeping your Slime wonderful is to make sure you put it back in its container when you’re not playing with it. This is because the slime dries when it gets into contact with air, so the more time it spends out, the quicker it will dry. Only keep your Slime in the fridge if it had gone a bit too slimy from playing with wet hands or if it melted in the sun.

Here are some things you can try to get your Slime back to its Wonder state:

Use warm water

One of the easiest ways to transform tough, rubbery slime is to use warm glycerin. Add 1/2 a teaspoon of glycerin to your slime in a microwave safe bowl.  Microwave for 5-10 seconds, then knead the glycerin into the softened slime. Repeat if needed.