2. Pour yogurt strains directly into the newly opened boxed milk, into the sterilized container, and then put them into the yogurt machine to start fermentation.
3. Refrigerate yogurt, drink as much as possible, and leave it for no more than 3 days, because it exceeds the time limit and does not meet the hygienic requirements of yogurt production.
4, homemade yogurt, can not repeatedly use homemade yogurt as a strain, which is prone to miscellaneous bacteria and bacteria, which is harmful to people's health.