Put your empty glue bottles aside after emptying them.
Set aside any extra water that’s in your glue bottle.
Swap your hand soap with 1⁄4 cup (59 mL) of foamy shaving cream (but not gel!) if you’d like.
Be sure to stir everything together thoroughly. Stop after you’ve added about 3 to 4 teaspoons (15 to 20 mL) of solution. You can use saline contact lens solution (with boric acid), liquid starch, or laundry detergent.
Scrape any pieces of excess slime into the ball with your spatula.
Continue experimenting and adding colors until you get one you like. To create a sparkling look, add some glitter and confetti. Keep in mind that the colors will be lighter than normal when using white glue.
Take your slime out of the bowl and knead it on a flat surface for the best results.
Check that your slime is jiggly. If you think it needs more hot water, add another 1⁄4 cup (59 mL) and mix it in again.
Your slime will probably last 1 week or less in the refrigerator. If you notice mold or bacteria growth, throw the slime away. Keep your refrigerator temperature at 35 to 40 °F (2 to 4 °C).