1. Pour 1 teaspoon Citric Acid into 1/4 cup unchlorinated water and stir. Crush the Rennet tablet and pour it into the other cup of unchlorinated water.
The Citric Acid should be dissolved by the time you have to use it. Most of the Rennet will be dissolved but there will still be some residue left.
2. If you haven't done so already, pour milk into your pot.
Make sure the milk is around 50 degrees when you pour in the Citric Acid