If ¼ cup (60 ml) of clear glue isn’t enough to thicken the slime, add another ¼ cup (60 ml) of clear glue and stir the mixture again. It should change to a thicker consistency. If you have the time, leave the slime in a sealed bag overnight once you have added the clear glue. This will help it to gel together.
Baking soda is a necessary ingredient for making slime with saline solution, as it helps to thicken the mixture. Be careful not to add too much baking soda at once, as this can make the slime hard.
If it doesn’t thicken, continue adding small amounts of cornstarch to the slime and then mixing it in. However, be careful not to add too much cornstarch at once, otherwise, the slime can turn hard.
Keep adding shaving cream until the slime reaches your preferred consistency.
Hold the slime back with your hand, or press a plate over the bowl or container as you are draining it to prevent the slime from falling out. Leave a tiny gap so that the liquid can get through. You can remove the excess liquid from any type of slime, and this should help to make it slightly less watery. It’s a good idea to remove the excess liquid before you begin trying to thicken the slime.
Many types of slime, such as Borax, liquid starch, and saline solution, all contain either clear or white glue. These types of slime change in consistency as you knead them, and normally become less runny and thicker as you knead.
Alternatively, store the slime in a Ziplock bag rather than an airtight container.
