This is a simple step by step method for making milk kefir.
In a glass jar add the kefir grains to milk.
Allow the kefir to sit at room temperature for 12 - 24 hours.
Using a plastic tea strainer separate the kefir grains from the milk.
Refrigerate or drink the kefir milk and add fresh milk to the grains.
Repeat the process daily.
Your keffir grains will continue to grow and multiply. This will quicken the rate in which one cup of milk becomes keffir. Add more milk if you wish to keep the 24 hour cycle going or give away excess keffir grains.
Milk Kefir Grains https://www.thermo.kitchen/diy-probiotic-milk-kefir-grains/