Mix the milk and water

Put in a low heat

When it starts forming bubbles before it start boiling then put it down.

Allow it to be warm not cool

Then add the culture and stir it

Cover it and keep in a warm place for 8 to 10 hours.

NOTE. The Culture here is unsweetened yogurt. And after making your own yogurt you can reserve small of it to be your culture when next making another yogurt.