I'm making first time natto in natto/black garlic pot. So I go by the recepie. First soak beans for 24h then steam to be softer. Put natto starter inside small amount of water and mix it with soya. Put soya beans in machine add mixed starter and ferment for 24h in 39 Celsius. I tried to keep everything sterilizes.
Proportions were: 500g soya beans 3g starter mixed with 20ml water
So the I just checked soya inside device after 20h and there is kid of white texture on it. Not sure if it's natural or it's mold. Is it normal to happen or I did something wrong?