In a mixing bowl, mix the glue and baking soda.
Add food coloring and stir until the color is evenly distributed.
Gradually add 1-2 tablespoons contact solution while stirring continuously.
Once the mixture starts to pull away from the sides, use your hands to knead. If it's too sticky, add a little more contact lens solution. If it's too runny, add a bit more glue.
Enjoy!