Table salt is a seasoning used by housewives every day. The bulk product is added to almost all dishes.
Sodium chloride should have the following characteristics: dryness, friability, absence of lumps.
However, amateur cooks are not always able to keep the product in this condition.
Salt often clumps together. This is due to its hygroscopic properties - the absorption of moisture.
However, it is very easy to prevent the contents of the salt shaker from turning into a wet (and then hardened) mass.
It is desirable to always have a few grains of rice in the salt shaker (or other container where the bulk product is stored).
A couple of grains are usually enough to keep the sodium chloride dry.
The thing is that rice also absorbs moisture. Moreover, it copes with this task faster and better than salt.
This is why the seasoning, which contains a little cereal, remains crumbly.
If water gets into the salt shaker, the rice will “draw” the moisture from the salt.