Why is my homemade yoghurt grainy?Updated a year ago

This usually happens when you make the yoghurt by over-inoculation. This is probably because the starter yoghurt has not been distributed well enough in the milk. Therefore, when inoculating the milk, it is recommended to distribute the yoghurt you use as starter carefully in the milk, for example by using a whisk. No lumpy residues should form or remain in the mixture.