Obtain live kefir grains from a trusted source
Add kefir grains to milk or sugar water, depending on the type
Keep the mixture at room temperature
Feed the grains regularly with fresh milk or sugar water
Strain the fermented liquid after 12 to 48 hours
Repeat the feeding and straining process continuously
Maintain clean equipment and avoid metal strainers if possible
Store the grains in fresh milk or sugar water when not in use
Share or divide mature grains to propagate more grains