I make a batch of kefir every few days. I just use UHT milk, which has already been sterilised in the pack. It's usually just a 5-10 minute affair for me to st

I make a batch of kefir every few days. I just use UHT milk, which has already been sterilised in the pack. It's usually just a 5-10 minute affair for me to strain out the fermented kefir and add a new pack of milk to the grains.