Always use whole milk or full cream milk for best results.
I have used lemon, vineger and fermented whey water for making the paneer / chhana.
If using Lemon, ensure you run the cheese in water to remove the lemon taste.
If using fermented whey water, dilute it and use.
If using vinegar, again dilute with water and use in drops.
Once you boil the milk, remove the milk from fire, slowly add the curdling agent by drops, while you gently stir the milk to enhance the coagulation.
Do not boil the milk once you add the curdling agent, else you will end up having chewy rasgullas.
Once you get greenish liquid, it means all the cheese is formed.
Use a cheesecloth or a muslin cloth to gather the cheese.
Cover the vessel with the cloth and pour it over. Gather the cloth together, gently tie the mouth and let it drain. Do not press it down to drain the liquid yourself.
The drained chhana should be crumbly and still has some moisture. If the chhana is too dry, you won’t be able to get the balls hold the shape.
I left the chhana draining for 30 mins, while some advice to be left overnight, I found 30 mins worked out well for me.