http://durgan.org/2016/July%20... 6 July 2016 Making Kefir
Making kefir is a simple process. Use homogenized milk, a tablespoon or so of the previous batch for seed, set for ~24 hours in a warm place not in sunlight,until separation begins, then make a new batch and consume the old. Pictures depict the method.
There are several modifications of the method.