It is definitely not normal. Normal is a uniform paste.

You have to pay attention to the cleaning procedures when changing milk, and be sure to clean it in place. It is best to use bottled water or cold boiled water for cleaning.

After changing the milk, place it in a cool place and avoid exposing it to direct sunlight.

Determine the appropriate amount of milk according to the amount of hidden mushrooms you have.

It is recommended that you do not use fresh milk. If you use fresh milk, you must boil the fresh milk and cool it to normal temperature before use. Otherwise, some bacteria in the fresh milk will have a certain impact on the production. And the process is cumbersome.

I now use pure milk directly, which saves trouble and has the same effect.