4tbspcontact lens solutionor more if it needs to be stiffer at the end
In a cup mix warm water and baking soda until dissolved. Pour glue into a bowl and mix in baking soda water together. Squirt in contact lens solution and mix again.
Knead with hands to incorporte well. If it is too sticky add 1 tsp of contact lens solution at a time, knead again and see if it is better until it is just right. Store in a baggie or airtight container to stay moist.