Store it in a clean glass or plastic container with a loose-fitting lid
Keep it at room temperature if you feed it daily or bake often
Refrigerate it if you bake less often
Feed it regularly before storing for long periods
Use equal parts starter, flour, and water by weight for feeding
Leave some headspace in the container for expansion
Mark the container with the feeding date
Stir before refrigerating if desired
Refresh it after long storage by discarding and feeding several times
Keep it away from direct sunlight and heat
Use clean utensils every time you handle it
Freeze it for very long-term storage if needed
Dry it for backup storage if desired