For successful yogurt making, be sure to:
y Clean and sanitize. This includes using pasteurized
milk, heating the milk, and cleaning
and sanitizing containers and workspaces. This
is all done to keep out unwanted bacteria.
y Maintain a moderate incubation temperature.
Streptococcus thermophilus and Lactobacillus
bulgaricus are thermophilic bacteria. They like
warm temperatures, but they can be killed at
temperatures above 130°F and will not grow
well below 98°F.