Add the baking soda, contact lens solution, glitter (if using) and one of the neon acrylic paints to the bowl.
Mix thoroughly with a fork.
Repeat steps 1-4 for each neon paint color you have. If it still feels sticky after kneading and mixing, add in a little more contact solution until it feels the way you want it to. Be careful to not use too much contact solution; if you add too much, it'll cause the slime to turn rubbery instead of slime-like.
Repeat steps 1-4 for each paint color you have.
Notes
Your contact lens solution must contain boric acid in order to work so check the ingredients before purchasing.