So, I appear to have a recurring issue with my herb pots. After use, I always wash them well and return them to the shelf where I store them. If I don't use the pot again for a month or so, I notice a fine mold that begins to grow on the interior of the pots that is easily wiped away. What's going on here?

Recently, I overheard a conversation about treating the pot by boiling salt water before use. I tried researching it on google without much result. However, I did find reference to making a light congee that is cooked down to concentrate to seal the microscopic cracks.

Does anyone know more about this?

peace

herb ox